Sounds

Question 1

Hearing range of a child

Answer 1

20 - 24,000 Hz

Question 2

Hearing range of a middle aged man

Answer 2

20 - 16,000 Hz

Question 3

Hearing range of an old man

Answer 3

20 - 8,000 Hz

Question 4

Longitudinal mechanical waves and is associated with the sense of hearing.

Answer 4

Sound

Question 5

Where does sound comes from?

Answer 5

A source

Question 6

This is transferred from the of source of the sound.

Answer 6

Energy

Question 7

Sound can be detected through these.

Answer 7

By an ear or an instrument.

Question 8

Fluctuations in pressure within normal atmospheric pressure

Answer 8

Sound Waves

Question 9

High pressured sound waves

Answer 9

Compressions

Question 10

Low pressured sound waves

Answer 10

Rarefactions

Question 11

This determines how loud or soft a sound is perceived to be

Answer 11

Loudness

Question 12

Loudness is related to the perception of sound by whom?

Answer 12

A listener

Question 13

The greater the pressure amplitude of a sinusoidal sound wave,

Answer 13

the greater the perceived loudness

Question 14

This is measured in decibels.

Answer 14

Intensity (Loudness)

Question 15

A description of how high or low the sound seems to a person.

Answer 15

Pitch

Question 16

Pitch is dependent on what?

Answer 16

The frequency of the sound.

Question 17

Sound waves with frequencies above the normal human range of hearing. Ranging from 20-100,000 Hz.

Answer 17

Ultrasound

Question 18

Sounds with frequencies below the normal human range of hearing. Ranging from 20-200 Hz.

Answer 18

Infrasound

Question 19

This depends on the number and relative amplitude of the other standing wave frequencies that makes up the complex sound wave.

Answer 19

Quality

Question 20

What do you call the difference in sound?

Answer 20

Tone color, quality or timbre.

Question 21

The time average rate of energy transferred per unit area (average power per unit area)

Answer 21

Intensity

Question 22

The time average rate of energy transferred per unit area. (average per unit area)

Answer 22

Sound intensity

Question 23

The comparison of the intensity of one sound and the reference sound.

Answer 23

Intensity level

Question 24

Result of interference of two sound waves of equal amplitude and slightly different frequencies.

Answer 24

Beats

Question 25

The alternating constructive and destructive interference causes the sound to be alternately soft and loud.

Answer 25

Beating

Question 26

Apparent change in frequency of sound due to relative motion of the listener and the source.

Answer 26

The doppler effect

Question 27

If the source of sound is moving faster than the speed of sound

Answer 27

Shock waves