Loudness and Amplitude
Physics ⇒ Waves and Sound
Loudness and Amplitude starts at 7 and continues till grade 12.
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See sample questions for grade 9
A sound has an intensity of 10-6 W/m2. If the reference intensity is 10-12 W/m2, what is the sound level in decibels?
A sound wave has an amplitude of 0.01 m. What is its amplitude in millimeters?
A sound wave has an amplitude of 0.02 m. If the amplitude is increased to 0.04 m, by what factor does the energy increase?
A sound wave has an amplitude of 2 units. If another sound wave has an amplitude of 4 units, how does its loudness compare?
A sound wave has an amplitude of 3 units. If the amplitude is reduced to 1 unit, how does the loudness change?
A sound wave has an amplitude of 5 mm. What is its amplitude in meters?
Describe how the amplitude of a sound wave can be increased in a musical instrument.
Describe how the loudness of a sound changes as you move away from the source.
Describe the effect of amplitude on the energy carried by a sound wave.
Explain the difference between intensity and loudness of sound.
Explain why a whisper and a shout have different loudness.
Explain why loudness is measured on a logarithmic scale rather than a linear scale.
Explain why two people may perceive the same sound as having different loudness.
If a sound is measured at 60 dB and another at 80 dB, which is louder and by how much?
If the amplitude of a sound wave is doubled, what happens to its loudness?
Loudness is a ________ property, while amplitude is a ________ property.
What is the relationship between the amplitude of a sound wave and its loudness?
A factory produces a constant sound with an intensity of 2 × 10-5 W/m2. If the reference intensity is 1 × 10-12 W/m2, calculate the sound level in decibels (dB).
A sound wave in air has an amplitude of 0.005 m. If the amplitude is tripled, by what factor does the intensity of the sound change?
A student is listening to music at a concert. The sound level is measured at 90 dB. If the sound intensity decreases by a factor of 100, what will be the new sound level in decibels?
