Sound and Waves in Physics

False (B)

By vibrating strings (e.g., sitar)

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

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

<p>Tabla = Vibrating membrane Flute = Vibrating air Bicycle bell = Vibrating plates Sitar = Vibrating string</p> Signup and view all the answers

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

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

<p>Reflect the action of the heart (A)</p> Signup and view all the answers

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

<p>Outer ear, middle ear, inner ear</p> Signup and view all the answers

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

<p>Pinna = Gathers sound from the environment Eardrum = Vibrates with sound Hammer, Anvil, Stirrup = Amplify sound vibrations Auditory Nerve = Carries signals to the brain</p> Signup and view all the answers

<p>Sound becomes blurred and distorted. (D)</p> Signup and view all the answers

<p>Metres per second (m/s) (C)</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>Stethoscope</p> Signup and view all the answers

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

<p>Supersonic speed</p> Signup and view all the answers

<p>sonic boom</p> Signup and view all the answers

<p>Megaphone = Designed to send sound in a specific direction Stethoscope = Listens to body sounds Sound board = Enhances sound clarity in halls Hearing aid = Amplifies sound for the hearing impaired</p> Signup and view all the answers

<p>Reflection of Sound = Sound bounces back when it hits a hard surface Echo = Repetition of sound due to reflection Sonic Boom = Noise from an object traveling faster than sound Speed of Sound = Distance traveled by sound in one second</p> Signup and view all the answers

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

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

<p>Shape of the object (C)</p> Signup and view all the answers

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

<p>To cause multiple reflections of sound.</p> Signup and view all the answers

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

<p>17.2 meters</p> Signup and view all the answers

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

<p>To convert amplified signals back into sound. (A)</p> Signup and view all the answers

<p>Sound bounces back (C)</p> Signup and view all the answers

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

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

<p>Hertz (Hz)</p> Signup and view all the answers

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

<p>Wavelength = Distance between consecutive compressions or rarefactions Frequency = Number of oscillations per unit time Amplitude = Maximum displacement from rest position Time Period = Time for one complete oscillation</p> Signup and view all the answers

<p>Distance from the sound source (B)</p> Signup and view all the answers

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

<p>f = 1/T</p> Signup and view all the answers

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

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

Sound is a form of energy that travels as waves and causes a sensation of hearing in our ears. It is produced by the vibrations of objects.

Vibrations cause compressions (high pressure) and rarefactions (low pressure) in the surrounding medium, creating a sound wave.

The matter through which sound travels is called a medium. It can be solid, liquid, or gas. Air is the most common medium.

Sound waves are mechanical waves because they require a medium to travel. They cannot travel through a vacuum like space.

The vibrating object pushes and compresses the air in front of it, creating a region of high pressure called a compression (C). When it moves back, it creates a region of low pressure called a rarefaction (R).

Sound is produced by the vibrations of strings, such as on a sitar.

Sound is produced by the vibrations of air, such as in a flute.

Sound is produced by the vibrations of a membrane, such as on a tabla or drum.

The substance through which sound waves travel. It can be solid, liquid, or gas.

A wave where particles oscillate parallel to the direction of wave travel.

The distance between two consecutive compressions or rarefactions in a sound wave.

The number of complete wave cycles (compressions and rarefactions) passing a point per second.

The maximum displacement of a particle from its resting position in a wave.

The time taken for one complete wave cycle (compression and rarefaction) to pass a point.

The subjective perception of how high or low a sound is. It is mainly determined by the frequency of the sound.

The characteristic that distinguishes different sounds even if they have the same pitch and loudness.

The subjective perception of sound intensity. Determined by the amplitude of the sound wave.

A wave where particles oscillate perpendicular to the direction of wave travel.

Ultrasound waves are used to create images of internal organs, like a baby in the womb.

It's a device used to find objects underwater. It uses sound waves to measure the distance, direction, and speed.

The outer part of the ear that collects sound from the environment.

It's located at the end of the auditory canal and vibrates when sound waves hit it.

The middle ear contains three tiny bones: hammer, anvil, and stirrup. These bones amplify the vibrations from the eardrum.

The distance a wave travels in one second.

Sound travels at different speeds depending on the substance it's passing through. Solids are the fastest, then liquids, and then gases.

Higher temperature means faster sound movement.

Higher humidity makes it easier for sound to travel.

The loud booming sound created when an object travels faster than the speed of sound, creating shock waves.

The bouncing back of sound waves when they hit a hard surface.

The repetition of sound caused by reflected sound waves.

For an echo to be heard, the time between the original sound and its reflection must be at least 0.1 seconds.

The minimum distance needed to hear a distinct echo is 17.2 meters.

The rolling sound of thunder is caused by multiple reflections of sound from different surfaces like clouds and the ground.

The persistence of sound in a large space due to multiple reflections from walls, ceiling, and floor.

A device that amplifies sound waves and directs them towards an audience.

A medical instrument used to listen to sounds within the body, especially in the heart and lungs.

A curved board placed behind speakers in large halls to amplify and direct sound towards the audience.

The range of sound frequencies a human can hear, typically between 20 Hz and 20,000 Hz.

Sound frequencies below 20 Hz that humans cannot hear.

Sounds of frequencies above 20,000 Hz that are inaudible to humans.

A device used by people with hearing difficulties to amplify sound signals.

A non-destructive technique used to detect cracks or flaws in metal objects by using high-frequency sound waves.

A cleaning process that uses high-frequency sound waves to remove dirt and debris from hard-to-reach areas.