Class 8 PHYSICS :Sound

<p>Elasticity (C)</p> Signup and view all the answers

<p>Longitudinal (C)</p> Signup and view all the answers

<p>The particles of the medium oscillate, transferring energy to neighboring particles. (D)</p> Signup and view all the answers

<p>Elasticity allows the particles to return to their original positions after being displaced. (C)</p> Signup and view all the answers

<p>It is caused by a repeating motion. (A)</p> Signup and view all the answers

<p>Frequency (D)</p> Signup and view all the answers

<p>Amplitude (C)</p> Signup and view all the answers

<p>Loudness is directly proportional to the square of the amplitude. (A)</p> Signup and view all the answers

<p>The distance of the sound source. (B)</p> Signup and view all the answers

<p>Quality (B)</p> Signup and view all the answers

<p>A thin, light string on a guitar. (B)</p> Signup and view all the answers

<p>The pitch increases. (A)</p> Signup and view all the answers

<p>Color (B)</p> Signup and view all the answers

<p>Larger surface area produces a louder sound. (C)</p> Signup and view all the answers

<p>Decibel (dB) (C)</p> Signup and view all the answers

<p>The air particles are pushed closer together, creating a region of higher pressure. (B)</p> Signup and view all the answers

<p>The air particles expand to fill the space created by the strip's movement. (B)</p> Signup and view all the answers

<p>The frequency of the sound wave is equal to the frequency of the strip. (A)</p> Signup and view all the answers

<p>The constant speed of sound in a particular medium. (A)</p> Signup and view all the answers

<p>By collisions between adjacent air particles. (D)</p> Signup and view all the answers

<p>The transfer of energy from the source to your ear through the air. (A)</p> Signup and view all the answers

<p>The displacement of the molecules is in the same direction to the direction of propagation. (D)</p> Signup and view all the answers

<p>The density of air is higher at compressions than rarefactions. (C)</p> Signup and view all the answers

<p>The pitch increases (D)</p> Signup and view all the answers

<p>Quality (A)</p> Signup and view all the answers

<p>It increases by a factor of 9 (B)</p> Signup and view all the answers

<p>The thin wire vibrates at a higher frequency than the thick wire. (B)</p> Signup and view all the answers

<p>All of the above (D)</p> Signup and view all the answers

<p>The loudness increases (A)</p> Signup and view all the answers

<p>Sound waves can travel through a vacuum. (A)</p> Signup and view all the answers

<p>The pitch is directly proportional to the frequency. (B)</p> Signup and view all the answers

<p>There will be no difference between the sounds. (C)</p> Signup and view all the answers

<p>The relative amplitudes of the subsidiary notes. (C)</p> Signup and view all the answers

<p>Soft and low-pitched. (D)</p> Signup and view all the answers

<p>The pitch decreases because the frequency decreases. (D)</p> Signup and view all the answers

<p>The length of the vibrating string on each guitar is different. (A)</p> Signup and view all the answers

<p>A thin wire in a guitar. (C)</p> Signup and view all the answers

<p>The compression and rarefaction of air molecules. (B)</p> Signup and view all the answers

<p>The amplitude of the sound wave. (A)</p> Signup and view all the answers

<p>The number and relative amplitudes of subsidiary notes. (D)</p> Signup and view all the answers

<p>The loudness is quartered. (D)</p> Signup and view all the answers

<p>The frequency (B), The amplitude (C)</p> Signup and view all the answers

<p>Elasticity (A)</p> Signup and view all the answers

<p>The speed of the compressions and rarefactions is greater than the speed of the air particles. (A)</p> Signup and view all the answers

<p>Left and right, parallel to the direction of wave propagation. (A)</p> Signup and view all the answers

<p>The sound would travel faster. (A)</p> Signup and view all the answers

<p>The decrease in pressure is caused by the expansion of air particles, due to the force exerted by the vibrating metal strip. (A)</p> Signup and view all the answers

<p>The speed of sound in the medium remains constant. (B)</p> Signup and view all the answers

<p>Elasticity allows the particles to vibrate about their mean positions, transferring energy. (C)</p> Signup and view all the answers

<p>The disturbance is periodic due to the consistent back and forth motion of the metal strip. (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>longitudinal</p> Signup and view all the answers

<p>periodic</p> Signup and view all the answers

<p>high</p> Signup and view all the answers

<p>low</p> Signup and view all the answers

<p>elasticity</p> Signup and view all the answers

<p>mean</p> Signup and view all the answers

<p>amplitude</p> Signup and view all the answers

<p>frequency</p> Signup and view all the answers

<p>amplitude</p> Signup and view all the answers

<p>frequency</p> Signup and view all the answers

<p>time</p> Signup and view all the answers

<p>pitch</p> Signup and view all the answers

<p>amplitude</p> Signup and view all the answers

<p>decibel</p> Signup and view all the answers

<p>pitch</p> Signup and view all the answers

<p>subsidiary</p> Signup and view all the answers

<p>waveform</p> Signup and view all the answers

<p>thin</p> Signup and view all the answers

<p>compressions</p> Signup and view all the answers

<p>mean</p> Signup and view all the answers

<p>mean</p> Signup and view all the answers

<p>elasticity</p> Signup and view all the answers

<p>waves</p> Signup and view all the answers

<p>amplitude</p> Signup and view all the answers

<p>frequency</p> Signup and view all the answers

<p>waveform</p> Signup and view all the answers

<p>decibel</p> Signup and view all the answers

<p>four</p> Signup and view all the answers

<p>thin</p> Signup and view all the answers

<p>less</p> Signup and view all the answers

<p>Amplitude</p> Signup and view all the answers

<p>surface</p> Signup and view all the answers

<p>strip</p> Signup and view all the answers

<p>direction</p> Signup and view all the answers

<p>compressed</p> Signup and view all the answers

<p>low</p> Signup and view all the answers

<p>rarefaction</p> Signup and view all the answers

<p>along</p> Signup and view all the answers

<p>frequency</p> Signup and view all the answers

<p>quality</p> Signup and view all the answers

<p>amplitude</p> Signup and view all the answers

<p>loudness</p> Signup and view all the answers

<p>loudness</p> Signup and view all the answers

<p>quality</p> Signup and view all the answers

<p>thin</p> Signup and view all the answers

<p>less</p> Signup and view all the answers

<p>The particles of the medium vibrate about their mean positions, meaning they oscillate back and forth without permanently changing their location.</p> Signup and view all the answers

<p>Compression</p> Signup and view all the answers

<p>Elasticity allows the particles of the medium to return to their original positions after being displaced, enabling the compressions and rarefactions to travel through the medium.</p> Signup and view all the answers

<p>The compressed air particles move forward, transferring energy to the neighboring particles.</p> Signup and view all the answers

<p>The air particles near the strip are compressed, resulting in a region of high pressure.</p> Signup and view all the answers

<p>The air particles near the strip move away from it, resulting in a region of low pressure.</p> Signup and view all the answers

<p>As the strip vibrates, it pushes and pulls the surrounding air particles. This creates areas of compression (high pressure) and rarefaction (low pressure), which travel through the air as a sound wave.</p> Signup and view all the answers

<p>Rarefaction refers to the region of reduced pressure in a sound wave where the air particles are spread apart.</p> Signup and view all the answers

<p>Loudness of a sound is directly proportional to the square of its amplitude. This means that if the amplitude is doubled, the loudness will increase fourfold.</p> Signup and view all the answers

<p>Larger vibrating bodies produce louder sounds because they transfer more energy to the surrounding medium – they send forth a greater amount of energy, increasing the amplitude of the sound wave.</p> Signup and view all the answers

<p>Higher frequency sound waves correspond to a higher pitch, perceived as a more shrill sound. Conversely, lower frequency sound waves have a lower pitch, perceived as a flatter sound.</p> Signup and view all the answers

<p>The characteristic of sound that distinguishes two sounds with the same loudness but different frequencies is pitch. Pitch is related to the frequency of the sound wave.</p> Signup and view all the answers

<p>The property of sound that allows us to distinguish between different instruments at the same pitch and loudness is called timbre or quality. This depends on the waveform.</p> Signup and view all the answers

<p>Increasing the tension of a guitar string increases the frequency of the sound it produces, leading to a higher pitch. Conversely, decreasing the tension results in a lower frequency and a lower pitch.</p> Signup and view all the answers

<p>The variation in quality or timbre of sound is determined by the waveform of the sound wave. This waveform is determined by the number and relative amplitudes of subsidiary notes, along with the principal note, present in the sound.</p> Signup and view all the answers

<p>Each person's vocal chords produce a unique waveform that is distinct from others. This unique waveform is what distinguishes one voice from another, even at the same pitch and loudness.</p> Signup and view all the answers

<p>As the metal strip vibrates, it pushes air particles together when it moves to the right, creating compressions. When it moves to the left, it pulls the particles apart, creating rarefactions.</p> Signup and view all the answers

<p>Elasticity allows the particles in the medium to return to their original positions after being displaced by the sound wave. Without elasticity, the compressions and rarefactions would not propagate, and sound wouldn't travel.</p> Signup and view all the answers

<p>The speed of the sound wave is the speed at which the disturbance (compressions and rarefactions) travels through the medium. The individual particles in the medium vibrate back and forth around their equilibrium positions and do not travel with the wave itself.</p> Signup and view all the answers

<p>A periodic disturbance repeats at regular intervals. In this case, the vibrating strip creates compressions and rarefactions repeatedly as it moves back and forth, resulting in a pattern that repeats.</p> Signup and view all the answers

<p>A more elastic medium allows for faster propagation of sound waves. This is because the particles in the medium can return to their equilibrium positions more quickly.</p> Signup and view all the answers

<p>A faster vibration would result in a sound wave with a higher frequency. A higher frequency sound wave is perceived as having a higher pitch.</p> Signup and view all the answers

<p>Sound requires a medium to travel. In a vacuum, there are no particles to vibrate and transfer the energy of the sound wave.</p> Signup and view all the answers

<p>In a longitudinal wave, the particles of the medium vibrate parallel to the direction of wave propagation. This is why the air particles move back and forth in the same direction as the sound wave is traveling.</p> Signup and view all the answers

<p>Loudness is directly proportional to the square of the amplitude of a sound wave. When the amplitude is doubled, the loudness increases by a factor of four (2 squared).</p> Signup and view all the answers

<p>The three characteristics are loudness, pitch, and quality (timbre). Loudness is determined by the amplitude of the sound wave, pitch is determined by its frequency, and quality is determined by the waveform, which includes the presence of subsidiary notes and their relative amplitudes.</p> Signup and view all the answers

<p>Two factors are the distance of the sound source and the surface area of the vibrating body. As distance increases, the sound wave spreads out, decreasing its intensity. A larger vibrating surface area produces a louder sound by transferring more energy to the medium.</p> Signup and view all the answers

<p>Pitch describes how high or low a sound is perceived, and it is primarily determined by the frequency of the sound wave. Higher frequencies correspond to higher pitches, while lower frequencies result in lower pitches. Quality refers to the unique characteristic of a sound that allows us to distinguish between two instruments even if they play the same note at the same loudness. It is determined by the wave form, which includes the presence of subsidiary notes and their relative amplitudes.</p> Signup and view all the answers

<p>Increasing the tension in a guitar string would increase the pitch of the sound produced. This is because increasing the tension increases the string's frequency of vibration. A higher frequency corresponds to a higher pitch.</p> Signup and view all the answers

<p>Loudness is directly proportional to the square of the amplitude of a sound wave. Therefore, if you know the loudness of a sound, you can calculate the amplitude by taking the square root of the loudness. For example, if a sound is 4 times louder than another, its amplitude is twice as large.</p> Signup and view all the answers

<p>A thinner wire, under the same tension as a thicker wire, will vibrate at a higher frequency. This is because the thinner wire has less mass, which enables it to vibrate more readily at a higher frequency. Higher frequency corresponds to a higher pitch.</p> Signup and view all the answers

<p>The unit for measuring loudness is the decibel (dB). The decibel scale is logarithmic, meaning that a small change in the decibel level corresponds to a significant change in the perceived loudness. This scale is based on the human ear's sensitivity to different sound intensities.</p> Signup and view all the answers

<p>Quality, also known as timbre, describes the unique character of a sound that allows us to differentiate between different instruments even if they play the same note at the same loudness. This is determined by the wave form of the sound, including the presence of subsidiary notes and their relative amplitudes. Instruments produce varying combinations of these notes, resulting in different qualities of sound.</p> Signup and view all the answers

<p>Despite playing the same note at the same loudness, the sounds will be different in their quality (timbre) because each instrument has a distinct waveform due to the unique way it produces sound. The guitar's waveform will primarily be determined by the vibrating strings, while the piano's waveform will be influenced by the soundboard and other components. This results in different combinations of subsidiary notes and their relative amplitudes, giving each instrument a distinct sound.</p> Signup and view all the answers

<p>Nine times louder.</p> Signup and view all the answers

<p>The guitar with the string made of a higher density material.</p> Signup and view all the answers

<p>The waveform or timbre.</p> Signup and view all the answers

<p>Higher.</p> Signup and view all the answers

<p>The sound would become quieter.</p> Signup and view all the answers

<p>The amplitude of the sound wave.</p> Signup and view all the answers

<p>Quiet.</p> Signup and view all the answers

<p>Very high.</p> Signup and view all the answers

<p>The timbre or waveform.</p> Signup and view all the answers

<p>Higher.</p> Signup and view all the answers

<p>The elasticity of air enables sound waves to propagate. When the metal strip compresses air particles, the elastic forces within the air push back on those particles, causing them to return to their original positions. This creates a restoring force that effectively balances the compression, leading to a wave of alternating compressions and rarefactions.</p> Signup and view all the answers

<p>The frequency of the sound waves generated by the instrument directly corresponds to the pitch of the musical note. Higher frequencies produce higher pitches, and lower frequencies produce lower pitches. The amplitude of the sound waves is related to the loudness of the note. Larger amplitudes correspond to louder sounds, and smaller amplitudes correspond to quieter sounds.</p> Signup and view all the answers

<p>In contrast to water waves where particles move with the wave, sound waves exhibit a different pattern. While the compressions and rarefactions travel through the medium, the individual particles of the medium oscillate backward and forward about their equilibrium positions without traveling along with the wave. This type of wave propagation is called a longitudinal wave, where the particle motion is parallel to the direction of wave propagation.</p> Signup and view all the answers

<p>The vibrating metal strip creates a periodic disturbance because it oscillates back and forth at a regular rate. This periodic motion causes the air particles in front of the strip to be compressed (when the strip moves forward) then expand again (when the strip moves back). This cycle of compression and expansion repeats, creating a periodic pattern of compressions and rarefactions in the air, which propagates as a sound wave.</p> Signup and view all the answers

<p>The speed of sound waves in a given medium, like air, is determined by the properties of that medium and is generally constant regardless of frequency. Therefore, both sound waves would travel at the same speed. However, the wave with the higher frequency would have a shorter wavelength. This is because wavelength and frequency are inversely proportional: higher frequency means shorter wavelength, and lower frequency means longer wavelength.</p> Signup and view all the answers

<p>The rarefaction region behind the vibrating strip experiences a decrease in pressure because the air particles in that region are spread out. The vibrating strip, when moving to the left, pulls the air particles away from the region, leading to a decrease in density and, consequently, a decrease in pressure. The elasticity of the air plays a crucial role in returning the stretched air particles to their equilibrium positions after they are pulled away from the strip, creating a restoring force and contributing to the propagation of the rarefaction.</p> Signup and view all the answers

<p>When the sound wave reaches your ear, the compressions of the wave cause your eardrum to vibrate inward, while the rarefactions cause it to vibrate outward. These vibrations are transmitted through a series of tiny bones in the middle ear, amplifying the sound. These amplified vibrations then reach the inner ear, specifically the cochlea, where they are converted into electrical signals. These signals are then transmitted to the brain via the auditory nerve, where they are interpreted as sound.</p> Signup and view all the answers

<p>In a longitudinal wave, like sound waves, particles vibrate parallel to the direction of wave propagation. This means that the particles move back and forth along the same line as the wave is traveling. In contrast, in a transverse wave, particles vibrate perpendicular to the direction of wave propagation. A good example of a transverse wave is a wave on a string. When you shake a string up and down, the wave travels along the string, but the string particles move up and down, perpendicular to the direction of the wave’s movement.</p> Signup and view all the answers

A wave that travels through a medium by particle vibration.

A wave where particles move parallel to the direction of wave propagation.

Rapid back and forth movement of an object creating sound.

A region in a sound wave where particles are close together.

A region in a sound wave where particles are spread apart.

The equilibrium position where particles rest when not vibrating.

The ability of a medium to return to its original shape after deformation.

Regular changes in a medium that create sound waves.

The maximum displacement of a particle from its mean position.

The number of vibrations produced in one second by a particle of the medium.

The time taken for one complete vibration of a particle.

The perception of sound intensity, proportional to the square of amplitude.

The perceived frequency of a sound; describes how high or low it is.

The characteristic sound of an instrument that distinguishes it from others.

The unit used to measure the intensity of sound.

Depends on amplitude, distance from source, and surface area of vibrating body.

Pitch depends on frequency; thinner wires = higher pitch.

Loudness is directly proportional to the square of amplitude.

If amplitude doubles, loudness increases four times.

Loudness is expressed in decibels (dB).

Loudness depends on amplitude, distance from source, and surface area of vibrating body.

Higher frequency results in higher pitch, making the sound shrill.

Pitch allows distinguishing between sounds of same loudness but different frequencies.

Quality is determined by the number of subsidiary notes and their amplitudes alongside the main note.

Larger vibrating surfaces produce louder sounds due to more energy release.

Higher tension in guitar strings leads to higher frequencies and pitches.

As air column length decreases, frequency of sound produced increases.

The way sound energy moves through a medium without particles traveling with it.

An entity that creates sound by vibrating and causing disturbances in the surrounding medium.

A part of a longitudinal wave where particles are closer together, increasing pressure.

The ability of a medium to return particles to their mean position after being disturbed.

Materials through which sound travels as particles vibrate in response to a disturbance.

The transfer of sound energy through a medium without particle movement.

In longitudinal waves, particles vibrate parallel to the wave direction.

A region where particles are close together, increasing pressure.

A region of low pressure where particles are spread apart.

When a metal strip vibrates, it creates sound by compressing air.

Particles move back to their equilibrium state after disturbance.

Air particles compress and expand as sound travels through them.

The time taken for one complete vibration of a particle.

Three key factors are amplitude, distance, and surface area.

Loudness is proportional to the square of amplitude; if amplitude doubles, loudness increases four times.

A larger amplitude results in a louder sound that is easily distinguished.

Pitch describes the perceived frequency; higher frequencies are perceived as shrill, while lower are flat.

Higher frequency produces a higher pitch; pitch changes based on frequency adjustments.

Unit used to express the intensity or loudness of sound.

A larger vibrating area increases loudness because it emits more energy.

Shortening the length of the air column increases the frequency and thus the pitch of sound produced.

Particles transfer energy without moving from their mean positions.

Compression is areas of high pressure; rarefaction is low pressure in sound waves.

When a metal strip vibrates, it compresses and rarefies air.

Particles return to their mean position due to the medium's elasticity after disturbance.

Sound energy travels without particles moving along; they only vibrate.

As a strip vibrates, it pushes air layers together or apart, causing sound.

Sound waves propagate through the medium as compressions and rarefactions, forming longitudinal waves.

Pitch is determined by frequency; higher frequency results in higher pitch and vice versa.

Loudness is directly proportional to the square of the amplitude of the wave.

If the amplitude of a wave is doubled, the loudness increases by four times.

Quality, or timbre, of sound depends on the number of subsidiary notes and their relative amplitudes along with the principal note.

Increasing the tension or decreasing the thickness of a string increases its frequency, which raises the pitch.

Musical sound is characterized by loudness, pitch, and quality.

Larger surface area of a vibrating body results in a louder sound due to increased energy release.

Loudness is measured in decibels (dB), which quantify sound intensity.

The constant speed at which sound energy is transferred through a medium.

If amplitude doubles, loudness increases by four times.

Characteristics are loudness, pitch, and quality.

Higher frequency results in a higher pitch of sound.

Using thinner wires increases the pitch of the sound produced.

Greater surface area of vibrating body leads to louder sound.

Loudness of sound decreases with distance from the source.

The time period is the inverse of frequency (T = 1/f).

Loudness is measured in decibels (dB).

The shape of a sound wave that defines its quality.

Loudness depends on amplitude, distance, and surface area.

A sharp or high-pitched sound produced by high frequency.

A unit to measure the intensity of sound; expresses loudness.

Quality of sound that distinguishes between different sources producing the same pitch.

Movement of an object that creates sound by disturbing the medium.

Larger vibrating surfaces produce louder sounds due to more energy release.

The ability of a medium to return to its original shape after being disturbed.

Loudness is proportional to the square of amplitude; higher amplitude = louder sound.

Higher frequencies produce higher pitches; pitch indicates sound highness or lowness.

Sound energy moves through a medium without the medium's particles traveling completely with it.

Particles transfer energy without moving from their mean positions.

Particles in longitudinal waves vibrate in the direction of sound travel.

A body creates a periodic disturbance in the medium, generating sound.

As the source moves, it compresses air particles, creating regions of higher pressure.

Region of low pressure where air particles are spread apart.

The energy of sound travels in the medium without particles moving long distances.

Vibrating metal strip creates sound by alternating compressions and rarefactions in air.

Particles return to their mean position after being displaced due to elasticity.

Loudness is directly proportional to the square of the amplitude of a wave.

Pitch is determined by frequency; higher frequency means a higher pitch sound.

A larger vibrating surface area produces louder sounds due to increased energy release.

Shortening the air column increases frequency and therefore the pitch of sound produced.

Higher tension in strings leads to higher frequency and higher pitch; lower tension results in lower frequency.

Sound is characterized by loudness, pitch, and quality.

Thin wires in instruments produce higher pitch due to increased frequency, thicker wires lower it.

Loudness is affected by amplitude, distance from the source, and surface area of the vibrating body.

Time period is the inverse of frequency, defined as T = 1/frequency.

An object that creates sound by creating periodic disturbances in the medium.

The process by which sound energy travels through a medium as compressions and rarefactions.

Particles return to their mean position after being displaced due to elasticity of the medium.

When a body vibrates, it causes nearby medium particles to experience compressions and rarefactions.

The equilibrium state where particles rest when not being disturbed by a wave.

Loudness increases with the square of amplitude; if amplitude doubles, loudness increases four times.

Larger vibrating surfaces produce louder sounds due to energy release.

Sound travels through a medium as longitudinal waves, with particles vibrating parallel to wave direction.

A vibrating body creates regular changes in the surrounding medium, leading to sound waves.

A vibrating strip pushes air particles creating compressions and rarefactions, producing sound.

Particles of the medium vibrate around their equilibrium or mean positions when sound travels.

Elasticity allows particles to return to their mean position after being disturbed by a sound wave.

The speed at which a disturbance travels through a medium.

Loudness is directly proportional to the square of amplitude.

If amplitude doubles, loudness increases by four times.

The loudness of sound decreases as the distance from the source increases.

Using a thinner wire increases the frequency and consequently the pitch of sound.

The greater the amplitude, the more intense or loud the sound produced.

A larger vibrating surface area produces a louder sound by emitting more energy.

A repeating disturbance created by a vibrating source generating sound waves.

When a metal strip vibrates, it alternates compressions and rarefactions in air.

After disturbance, particles naturally return to their equilibrium state due to elasticity.

Elasticity allows particles to return to their mean positions after being disturbed.

Musical sound has three main characteristics: loudness, pitch, and quality.

If the amplitude of a wave doubles, the loudness increases by four times.

As frequency increases, the pitch of the sound becomes sharper or shriller.

Larger vibrating surfaces increase loudness by emitting more energy.

Loudness depends on amplitude, distance from the sound source, and surface area of vibrating body.

In musical instruments, higher tension results in higher frequency and pitch, while lower tension yields lower pitch.

As a source vibrates, it compresses and expands air particles creating sound waves.

Loudness is proportional to the square of amplitude: L ∝ (amplitude)².

Greater the amplitude of vibrations, louder the sound produced.

Using thinner wires in stringed instruments increases pitch due to higher frequency.

Timbre allows recognizing a voice or instrument by its unique sound characteristics.

Pitch increases with frequency and tension of the vibrating body; low tension = low pitch.