Quiz 1

Question 1

Soundwave

Answer 1

A vibrational disturbance that involves mechanical motion of molecules transmitting energy from one place to
another

Question 2

Compression

Answer 2

(1) Reducing a signal’s output level in relation to its input level to reduce dynamic range. (2) The drawing
together of vibrating molecules, producing a high-pressure area. See also rarefaction.

Question 3

Rarefaction

Answer 3

Temporary drawing apart of vibrating molecules, causing a partial vacuum to occur. See also compression (2).

Question 4

Cycles Per Second

Answer 4

Hertz

Question 5

Hertz

Answer 5

(Hz) Unit of measurement of Frequency; Numerically equal to the Cycles Per Second(cps)

Question 6

Kilohertz

Answer 6

A measure of Frequency equivalent to 1,00 hertz

Question 7

frequency!+!octaves%!

Answer 7

The number of times per second that a sound source vibrates, expressed in hertz (Hz);
formerly expressed in cycles per second (cps).

Question 8

Pitch

Answer 8

The subjective perception of frequency—the highness or lowness of a sound.

Question 9

Wavelength

Answer 9

The length of one cycle of a sound wave. Wavelength is inversely proportional to the frequency of a sound;
the higher the frequency, the shorter the wavelength.

Question 10

Infrasonic

Answer 10

The range below the frequencies audible to human hearing.

Question 11

Low End

Answer 11

The bass range of the frequency spectrum.

Question 12

Bass

Answer 12

The low range of the audible frequency spectrum; usually from 20 to 320 Hz.

Question 13

Mid Range

Answer 13

The part of the frequency spectrum to which humans are most sensitive;
the frequencies between roughly 320 and 2,560 Hz

Question 14

Treble

Answer 14

Frequency range between roughly 5,120 Hz and 20,000 Hz, the highest two octaves in the audible frequency spectrum.

Question 15

High End

Answer 15

The treble range of the frequency spectrum.

Question 16

Ultrasonic

Answer 16

Frequencies above the range of human hearing.

Question 17

Amplitude

Answer 17

The magnitude of a sound wave or electric signal, measured in decibels

Question 18

Decibel

Answer 18

(dB) A relative and dimensionless unit to measure the ratio of two quantities.

Question 19

Velocity

Answer 19

The speed of a sound wave: 1,130 feet per second at sea level and 70°F.

Question 20

Direct Sound

Answer 20

Sound waves that reach the listener before reflecting off any surface.

Question 21

Indirect Sound

Answer 21

Sound waves that reflect from one or more surfaces before reaching the listener.

Question 22

Reverberation

Answer 22

Multiple blended, random reflections of a sound wave after the sound source has ceased vibrating. The types of reverberation in current use are digital, convolution, plate, and acoustic chamber.

Question 23

Echoes

Answer 23

Sound reflections delayed by 35 ms or more that are perceived as discrete repetitions of the direct sound

Question 24

Sound Envelope (timbre)

Answer 24

The unique tone quality or color of a sound.

Question 25

Attack

Answer 25

(1) The way a sound begins—that is, by plucking, bowing, striking, blowing, and so on.
(2) The first part of the sound envelope—how a sound starts after a sound source has been vibrated

Question 26

Decay

Answer 26

How fast a sound fades from a certain loudness.

Question 27

Sustain

Answer 27

In the sound envelope, the period during which the sound’s relative dynamics are maintained after its initial decay.

Question 28

Release

Answer 28

In the sound envelope, the time and the manner in which a sound diminishes to inaudibility.