CSAD 340 Quiz 9 Pt 2

for quiz 9

pitch

the subjective/perceptual correlate of frequency

mel scale

a psychophysical scale that relates the pitch to frequency for pure tones, as pitch and frequency are not related by a 1:1 ratio

what pitch of complex sounds is primarily determined by

fundamental frequency

difference tone

a tone perceived by a listener whose frequency is the difference between two tones presented at a high intensity level even though no acoustic energy is present at that frequency

summation tone

a tone perceived by a listener whose frequency is the sum of two tones presented at high intensity levels even though no acoustic energy is present at that frequency

case of the missing fundamental

an auditory phenomenon where low frequency pitch perception is preserved when the fundamental frequency is absent from the signal

residue pitch

a perception of a pitch similar to the fundamental frequency despite an absent fundamental frequency; it is thought that this perception of pitch is related to the remaining harmonics of the fundamental frequency and their relative spacing

timbre

subjective attribute that differentiates sounds with the same duration, pitch, and loudness; due to the relative amplitude of harmonics - a stimulus with more harmonics is often described as being “fuller” or “richer”; the judgement of sound quality distinct from judgements of pitch and loudness

timbre difference

the perceptual difference between two sounds with the same duration, pitch, and intensity

differential sensitivity

the ability to detect a change or difference (increase or decrease) between two sounds; the change can be in frequency, intensity, or duration

weber’s law

states that a stimulus must be changed by a constant proportion of itself to be judged as different; represented by (change in s)/(s) = k

frequency and weber’s law

only follows weber’s law for the mid-frequencies

intensity and weber’s law

does not follow it - known as a “near” miss

duration and weber’s law

does not follow weber’s law

difference limen/just noticeable difference

the smallest difference between two stimuli that can be perceived by a listener