Sound Applications

the energy of a wave is related the most to its

• frequency

• amplitude

• speed

the common characteristics of mechanical and electromagnetic waves is that they

• carry energy

• are longitudinal

• propagate in vacuum

if we increase the amplitude of a wave, then its frequency will

• increase

• decrease

• not be affected

in a certain medium, if we double the frequency of the sound produced, then its wavelength is:

• reduced to its half

• doubled

• unchanged

the loudspeaker converts the electric energy into:

• electromagnetic energy

• acoustical energy

• magnetic energy

the speed of the sound depends on:

• its frequency

• its amplitude

• the medium of propagation

a horn is triggered in open space, 2.5s later, an echo is heard. then the average distance between the horn and the obstacle is:

(knowing that the speed of sound in air is 340 m/s)

• 850 m

• 425 m

• 136 m

A sound of frequency 10kHz is called

• deep sound

• medium sound

• sharp sound

In a sound wave, the distance between two consecutive compressions is known as:

• wavelength

• frequency

• amplitude

What happens to the speed of sound when the temperature of the air increases?

• It decreases

• It increases

• It remains the same