C13 Terms

Question 1

The form of energy detectable by our ears

Answer 1

sound

Question 2

Consists of waves with differing frequencies

Answer 2

acoustic spectrum

Question 3

How high or low an audible tone sounds to he human ear

Answer 3

pitch

Question 4

The response of your ear to the intensity of a sound wave

Answer 4

loudness

Question 5

A measure of the power contained in an acoustic wave

Answer 5

intensity

Question 6

Loudness is measured in?

Answer 6

decibel (dB)

Question 7

The particular sound of an instrument

Answer 7

quality

Question 8

The tone a string produces

Answer 8

fundamental

Question 9

Shorter faster vibrations produce higher pitches called?

Answer 9

harmonic

Question 10

The study of controlling the sound that reaches our ears

Answer 10

acoustics

Question 11

Multiple echoes of a sound

Answer 11

reverberation

Question 12

Produces mealy the full rang of tones

Answer 12

acoustic synthesizer

Question 13

The process of making sound louder

Answer 13

acoustic amplification

Question 14

Using sound to detect things

Answer 14

echolocation

Question 15

An acronym for sound navigation and ranging

Answer 15

sonar

Question 16

Under water microphones

Answer 16

hydrophone

Question 17

Produces and listens for sound

Answer 17

transducer

Question 18

Very low wave frequencies

Answer 18

infrasonic waves

Question 19

Waves above the human ear

Answer 19

ultrasonic waves

Question 20

How do sound waves differ from water waves?

Answer 20

They are longitudinal waves

Question 21

What factors affect the speed of sound in a medium?

Answer 21

The stiffness of the medium and its density

Question 22

What audible property of sound is related to its frequency?

Answer 22

Pitch

Question 23

What makes various sources sound different even if they are playing the same pitch?

Answer 23

There quality

Question 24

What factors affect the frequency of a sound heard by a listener compared to the sounds frequency at its source?

Answer 24

The Doppler effect

Acoustics

Question 25

Name six parts of the human anatomy that affects the voice.

Answer 25

Larynx, vocal cords, throat, sinus passages, diaphragm, and the tongue teeth and lips

Question 26

What are the three main functions of the external ear?

Answer 26

Helps determine the direction, serves as a resonating chamber and amplifies the sound

Question 27

What design feature of he middle ear increases the amplitude of the sound before it is before it is processed in the inner ear?

Answer 27

The oval window

Question 28

State the two primary types of sound amplification

Answer 28

Mechanical and electronic amplification

Question 29

What two pieces of information must be processed to determine distance and direction to the target?

Answer 29

The time interval and the direction

Question 30

What are the two different ways sonar operates? What is the main purpose for each method?

Answer 30

Echolocation and sonar echolocation is used by animals and sonar is used by man

Question 31

What factor limits the usefulness of ultrasonic waves?

Answer 31

They are very short