physics sound
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Questions and Answers

What does sound help us to do?

  • Touch
  • See
  • Taste
  • Communicate (correct)

    • Vibrating bodies produce sound.

    True

    Name one activity that demonstrates how sound is produced.

    Striking a metal plate or plucking a rubber band.

    The ______ of a rubber band creates sound when plucked.

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

    Match the musical instruments with their respective classifications:

    <p>Flute = Wind instrument Tabla = Percussion instrument Harmonium = Keyboard instrument Sitar = String instrument</p> Signup and view all the answers

    How do we typically know when someone is at our door?

    <p>Hearing a knock or a doorbell</p> Signup and view all the answers

    Some sounds are louder than others because they travel faster.

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

    What is one way to feel vibrations when a sound is produced?

    <p>Touching a vibrating object, like a metal plate.</p> Signup and view all the answers

    What happens to the loudness of sound if the amplitude of vibration doubles?

    <p>It increases by a factor of 4</p> Signup and view all the answers

    A soft whisper has a loudness level of 10 dB.

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

    What unit is used to express loudness of sound?

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

    The louder the sound, the larger the amplitude of the ________ producing the sound.

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

    Match the sources of sound with their loudness levels (in dB):

    <p>Normal breathing = 10 dB Normal conversation = 60 dB Busy traffic = 70 dB Average factory = 80 dB</p> Signup and view all the answers

    What determines the pitch of a sound?

    <p>Frequency of vibration</p> Signup and view all the answers

    A bird produces a lower-pitched sound compared to a lion.

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

    What causes discomfort to the ear when it comes to sound levels?

    <p>Sounds above 80 dB</p> Signup and view all the answers

    Which range of frequencies is considered audible for the human ear?

    <p>20 to 20,000 Hz</p> Signup and view all the answers

    The frequency of a child's voice is generally lower than that of an adult.

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

    What term is used to describe sounds that are unpleasant?

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

    Sounds of frequencies lower than about _______ vibrations per second cannot be detected by the human ear.

    <p>20</p> Signup and view all the answers

    Match the following terms with their definitions:

    <p>Audible Sounds = Sounds detectable by the human ear Inaudible Sounds = Sounds not detectable by the human ear Noise Pollution = Excessive unwanted sounds in the environment Musical Sound = Sound that is pleasing to the ear</p> Signup and view all the answers

    Which of the following is NOT a source of noise pollution?

    <p>Bird singing</p> Signup and view all the answers

    Dogs can hear frequencies higher than 20,000 Hz.

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

    What is the effect of loud musical sounds on their melodiousness?

    <p>They may lose their melodious quality.</p> Signup and view all the answers

    What frequency range does the ultrasound equipment operate at?

    <p>Above 20,000 Hz</p> Signup and view all the answers

    Noise pollution can lead to hypertension and anxiety.

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

    Name one measure that can help reduce noise pollution in residential areas.

    <p>Silencing devices</p> Signup and view all the answers

    Total hearing impairment is usually present from ______.

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

    Match the following health issues with their causes:

    <p>Hypertension = Excessive noise exposure Anxiety = Noise pollution Hearing impairment = Injury or disease Defective speech = Hearing loss</p> Signup and view all the answers

    How can noise from automobiles be minimized?

    <p>By minimizing the use of automobile horns</p> Signup and view all the answers

    Trees can help cut down noise from reaching residents.

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

    What can improve the quality of life for hearing-impaired individuals?

    <p>Technological devices</p> Signup and view all the answers

    What is the frequency of oscillation expressed in?

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

    Sound can travel in a vacuum.

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

    What part of the human body senses sound vibrations?

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

    Louder sounds are produced by vibrations with higher __________.

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

    Match the terms related to sound with their definitions:

    <p>Amplitude = The loudness of sound Frequency = Number of oscillations per second Pitch = How high or low a sound is Noise = Unpleasant or unwanted sounds</p> Signup and view all the answers

    Which of the following describes noise pollution?

    <p>Excessive or unwanted sounds</p> Signup and view all the answers

    Higher frequency vibrations result in a lower pitch sound.

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

    What is one method to reduce noise pollution?

    <p>Plantation on the roadside</p> Signup and view all the answers

    Which of the following statements is true regarding lightning and thunder?

    <p>Lightning travels faster than sound.</p> Signup and view all the answers

    Sound can travel through solid objects just as effectively as it travels through air.

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

    What is the main function of the larynx?

    <p>The larynx produces sound and protects the airway during breathing.</p> Signup and view all the answers

    The __________ is used to produce musical notes by vibrating air.

    <p>vocal cords</p> Signup and view all the answers

    Match the following activities with their outcomes:

    <p>Using a taut string to hear sound = Experiencing vibration through the string Making toy telephones = Transmitting voice over distance Identifying noise pollution sources = Raising awareness about sound issues Playing a musical instrument = Creating a melody through vibrations</p> Signup and view all the answers

    What can be done to control noise pollution?

    <p>Plant more trees and create noise barriers.</p> Signup and view all the answers

    Lightning travels faster than sound, which is why we see it before we hear the thunder.

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

    Name one musical instrument that produces sound through vibrating strings.

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

    Study Notes

    Sound Production

    • Sound is produced by vibrating objects.
    • In humans, vocal cords vibrate to produce sound.
    • Sound travels through a medium (gas, liquid, or solid).
    • Sound cannot travel in a vacuum.

    Sound Transmission

    • The eardrum detects sound vibrations.
    • The eardrum sends vibrations to the inner ear.
    • The signal from inner ear travels to the brain.

    Frequency

    • Frequency is the number of vibrations per second.
    • Measured in Hertz (Hz).
    • Higher frequency means a higher pitch (shrill sound).
    • Lower frequency means a lower pitch (deep sound).

    Amplitude

    • Amplitude is the size of vibration.
    • Larger amplitude means louder sound.
    • Smaller amplitude means softer sound.

    Noise vs Music

    • Pleasant sounds are considered music.
    • Unpleasant sounds are considered noise.

    Noise Pollution

    • Excessive noise is called noise pollution.
    • Noise pollution comes from many sources.
    • Noise pollution can affect human health.

    Audible Sounds

    • Humans can hear sounds with frequencies between 20 Hz and 20,000 Hz.
    • Frequencies below 20 Hz or above 20,000 Hz are considered inaudible.
    • Some animals can hear higher frequencies.

    Sound in Different Mediums

    • Sound travels differently in different mediums (solids, liquids, and gases).
    • Sound travels fastest in solids, slower in liquids, and slowest in gases.

    Hearing Impairment

    • Partial or total hearing loss can be caused by disease, injury or age.
    • Technological aids can improve the quality of life for those with hearing impairments.

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    Related Documents

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    Description

    Test your knowledge on sound production, transmission, and related concepts. This quiz covers topics including frequency, amplitude, and the distinction between noise and music. Explore the science behind how sound travels and its effects on humans.

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