hearing science quiz 4

if a signals rise or fall time is very short, an audible transient is heard

true

in __ system, the output ampltude is no proportional to the input amplitude

non-linear

when do you have a frequency selective system, __ occurs from the input to the output

filtering

longer rise and fall time results in less transient distortion

true

peak clipping is an example of

amplitude distortion

unit of pitch is

mels

generation of combination tones

intermodulation distortion

term "just noticable differences" refers to the psychological sensation that corresponds to a change in the physical stimulus that can barley be detected

true

study of a listeners ability to detect small differences in pitch measure

frequency discrimination

time required for sound energy to decay by 60 db

t 60

the property of sound waves to bend around obstacles and reforms

diffraction

wrong statement

the precise relatioship between pitch, the perceptual and physical quantity is very straighforward. for example, tripling of a pitch from 1000 mels to 3000 mels

for a complex periodic signal, the pitch often corresponds to the __ frequency in the waveform, which by definintion if the fundamnetal frequency

lowest

as a sound course moves away, the pitch of the sound

decreases

if the impedance is infinite

the intensity of the reflected wave will equal the intensity of the incident wave

as the absorption coefficient increases

reflection decreases and reverberation time decreases

reverberation time is

directly proportional to the volume of the room and inversly proportional to the area of the opening

absorption coefficent varies with the intensity of the incident wave

false

at resonant frequency, stiffness reactance and mass reactance cancle eachother out

true

if the fundamental frequnecy of a string fixed at both ends is 200 hz, the frequency of the third harmonic is

600 hz