acoustics worksheet

Question 1

frequency

Answer 1

physical
Hz
oscilloscope

Question 2

intensity

Answer 2

physical
dB
sound level meter

Question 3

pitch

Answer 3

perceptual (frequency)
Mel
mel scale

Question 4

loudness

Answer 4

perceptual (intensity)
Phon/Sone
loudness contour curve

Question 5

low frequency

Answer 5

long wavelength

Question 6

high frequency

Answer 6

short wavelength

Question 7

consonants

Answer 7

help understand speech

Question 8

vowels

Answer 8

help hear speech

Question 9

Fourier theory

Answer 9

any complex waveform can be decomposed into a set of sine waves having a particular amplitude, frequency, and wavelength

Question 10

fundamental frequency

Answer 10

lowest frequency

Question 11

waveforms limitation

Answer 11

only one tone at a time

Question 12

waveforms frequency

Answer 12

of cycles occurring per second

Question 13

waveforms intensity

Answer 13

measure of maximum displacement from baseline (top of curve)

Question 14

waveforms time

Answer 14

x-axis

Question 15

spectrogram frequency

Answer 15

y-axis
low frequency at bottom
high frequency at top

Question 16

spectrogram intensity

Answer 16

darkness of spectrogram at particular frequency
brighter represent higher

Question 17

spectrogram time

Answer 17

x-axis

Question 18

spectrum envelope frequency

Answer 18

x-axis

Question 19

spectrum envelope amplitude

Answer 19

y-axis

Question 20

spectrum envelope limitation

Answer 20

does not display time
snapshot in time

Question 21

1000 hz - 3000 hz

Answer 21

where most speech lies and where we hear best
most accurate perception correlation between intensity and loudness

Question 22

sound filter theory

Answer 22

explains speech production
human speech sounds have a source (vocal folds) and the filtering of these sounds by the vocal tract

Question 23

resonance

Answer 23

occurs when a tuning fork is exposed to a sound wave at its natural frequency causing it to vibrate strongly

Question 24

damping

Answer 24

reducing amplitude of vibrations through air resistance

Question 25

Fourier theories

Answer 25

explains how the forks vibrations produce a fundamental frequency and harmonics that contribute to overall sounds