Hearing

Question 1

distal vs proximal stimuli

Answer 1

sources of sound vs physical dimensions

Question 2

what is distal stimuli?

Answer 2

something vibrating like vocal chords and tuning fork

Question 3

what is proximal stimulus?

Answer 3

sound waves; changes in air pressure

Question 4

compressions vs rarefactions

Answer 4

c- high air pressure (moles close together); r-low air pressure (moles spread apart)

Question 5

3 dimensions of sound

Answer 5

frequency, amplitude and timbre

Question 6

what is the audibility curve?

Answer 6

shows effect of frequency on loudness at threshold; absolute threshold; most sensitive in the 2,000-6,000 Hz

Question 6

what two things factor into loudness?

Answer 6

frequency and amplitude

Question 7

What are equal loudness contours?

Answer 7

everything on each contour has a standard of 1,000 Hz; participants had to adjust loudness of diff frequencies

Question 8

Fourier Analysis of Complex Waveform

Answer 8

breakdown of complex wave into harmonics

Question 9

what is the fundamental frequency?

Answer 9

the first harmonic– pitch

Question 10

what is the timbre in terms of the Fourier spectrum?

Answer 10

overall pattern of harmonics and amplitude

Question 11

sound onset vs decay

Answer 11

beginning of sound and how sound goes to rest; helps diff sounds w same pitch