Tag: physics

Questions Related to physics

State whether given statement is True or False
Water animals are also subjected to noise pollution.

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. True

  2. False

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Correct Option: A
Explanation:

Yes. Water animals are affected by submarines and other vehicles which travel through the sea or ocean creating loud sound waves in water.

State whether given statement is True or False
Noise pollution can cause partial hearing impairment.

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. True

  2. False

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Correct Option: A
Explanation:

Noise pollution can cause partial hearing impairment to human ears.

What all are the sources of noise pollution?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Household sources like mixers, grinders, vacuum cleaners etc.

  2. Social events with loud speakers

  3. Transportation noises, traffic jams

  4. All of the above

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Correct Option: D
Explanation:

All the given ones, among others, are effective sources of noise pollution.

State whether given statement is True or False
Both Noise and Music when very loud can be damaging to human ears.

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. True

  2. False

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Correct Option: A
Explanation:

The statement is true. Any sound, music or noise, above $65\ dB$ of loudness, is harmful and damaging to human ears.

If pitch of a sound is pleasing to our ears, the sound is:

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Music

  2. Noise

  3. A combination of music and noise

  4. None of these

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Correct Option: A
Explanation:

Pitch of music is pleasing to our ears.

Amplitude of wave is:

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. the distance wave moves in one second

  2. distance wave moves in one time period of wave

  3. maximum distance moved by medium particles on either side of mean position

  4. distance equal to 1 wavelength

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Correct Option: C
Explanation:

Amplitude is the maximum distance moved by medium particles on either side of mean position.

Fill in the blanks:

1) Perceived fundamental frequency of sound = ?

2) Quality of sound = ?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution
    1. Tone
      2. Pitch
    1. Pitch
      2. Tone
    1. Pitch
      2. Loudness
    1. Loudness
      2. Tone
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Correct Option: B
Explanation:

1) Pitch is defined as the perceived fundamental frequency of sound.

2) Tone is defined as the quality of sound.

Noise is produced by

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Vibration with high frequency

  2. Regular vibration

  3. Regular and periodic vibration

  4. Irregular and non-periodic vibration

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Correct Option: D
Explanation:

Smooth and periodic vibration is music and irregular and non-periodic vibration is noise.

If the density of  sound is increased by a factor of 100, by how many decibles is the sound level increased?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. 100 dB

  2. 1000 dB

  3. 20 dB

  4. 30 dB

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Correct Option: C

State whether the given statement is True or False :
The part of the ear is damaged most easily by continued exposure to loud noise is stirrup.

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. True

  2. False

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Correct Option: B
Explanation:

Sounds can be harmful when they are too loud, even for a brief time, or when they are both loud and long-lasting. These sounds can damage sensitive structures in the inner ear and cause noise-induced hearing loss (NIHL).
With intense exposures (>/= 140 dB SPL), a portion of the organ of Corti is displaced from its position on the basilar membrane and is often found floating within scala media. Swollen hair cells are found at the edges of the lesion and signs of damage are apparent in the nonmyelinated nerve fibers of the organ of Corti both within and adjacent to the displaced portion.
With moderate-level exposures for long durations such as those found in noisy industries (i.e., </= 90 dB SPL), a few scattered sensory (i.e., hair) cells probably degenerate within the organ of Corti during each day of work. In general, the noise-induced loss of hair cells is very gradual. The amount of structural damage which is present in a given ear depends on its auditory history. The longer the exposure, the greater the number of missing sensory cells.
Hence, the part of the ear is damaged most easily by continued exposure to loud noise is hair cells.