Sound_LS_2

What is amplitude

• The measure of the number of waves passing a point per second.
• The measure of the speed of a wave.
• The measure of the distance between two consecutive crests of a wave.
• The measure of the maximum displacement of a wave from its rest position.

Frequency = Number of ______ / time

• Events
• Occurrences
• Incidents
• Happenings
• Vibrations

If 125 oscillations are produced in 5 seconds, what is the frequency in hertz?

Frequency = Number of oscillation/ time = 125/5

• 100 Hz
• 10 Hz
• 50 Hz
• 25 Hz

How does loudness depend on the amplitude of vibrations?

• Loudness decreases with the square of the amplitude of vibrations.
• Loudness is directly related to amplitude. If amplitude is high, then loudness is high. But if amplitude is low, then the loudness is low.

• Loudness increases with the cube of the amplitude of vibrations.
• Loudness is not affected by the amplitude of vibrations.

By how much will the loudness of a sound change when the amplitude of vibrations is doubled?

• Increase by 10 decibels
• Decrease by 3 decibels
• Stay the same
• Doubled.

By how much will the loudness of a sound change when the amplitude of vibrations is halved?

• Loudness is halved.

• The loudness of the sound will remain the same
• The loudness of the sound will be doubled
• The loudness of the sound will be reduced to half of its original value

Name the unit used to measure the loudness of sound. Also, write its symbol.

• meter (m)
• decibel (dB)
• centimeter (cm)
• kilogram (kg)

What is the loudness of a normal conversation in decibels?

• 20-30 decibels
• 60-70 decibels
• 100-110 decibels
• 40-50 decibels

On what factor does the pitch of a sound depend?

• Volume
• Color
• Frequency
• Temperature

A high-frequency sound wave has a ______ pitch

• lower
• medium
• constant
• higher