Auditory streaming without spectral cues.

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Auditory streaming without spectral
cues. Nicolas Grimault, Sid P. Bacon
Psychoacoustics Lab., Dept. of Speech and
Hearing Sci., Arizona State Univ., Tempe, AZ
85287-1908 Christophe Micheyl UMR CNRS 5020,
Pav. U, Hp. E. Herriot, Lyon 69437, France
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Introduction
Auditory Streaming, the peripheral channeling
theory
1 stream
2 streams
Frequency
B
B
Frequency
A
A
A
A
B
B
Silence
...
A
A
A
A
Silence
...
Fb
ERB
ERB
Fb
Fa
Fa
ERB
Time
Time
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If F0A lt lt F0B, A and B are perceptively teased
apart.
A B A Silence
A B A
Frequency
ERBs
Time
Vliegen and Oxenham (1999) Vliegen et al.
(1999) Grimault et al. (2000)
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Are temporal features relevant cues for auditory
streaming ?
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1 The constant stimulus procedure.
10
? oct. Hz 0 0 0.3 23 0.5 41 0.7
62 0.8 74 1 100 1.2 130 1.4 164 1.6
203 1.8 248 2 300 2.5 466 3 700
A B A - A B A
- ...
Frequency
Time (ms)
100
20
6400 (20 ABA-)
0
A modulated white noise, Fm100 Hz B modulated
white noise, Fm100? Hz Both modulated at 100.
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• Levels of presentation
• Signal (sequences of A- and B-modulated noises)
• N0 50 dB SPL
• Masker (Low-pass noise Fc900 Hz.)
• N0 50 dB SPL

dB 50
F
dB 50
F (Hz)
900
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Results 5 subjects ? 40 repetitions per
estimation.
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2 The timing procedure.
FmA 100 Hz, FmB 100 ? Hz.
A B A - A B A
- ...
Time
? (oct.)
3
0
Time
Blocks of 30 presentations

• 10 duration conditions from 11 s to 34 s.
• 3 repetitions per condition.
• Increasing and decreasing sequences.

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Discussion and Summary
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Amplitude Modulation Rate Discrimination (AMRD).
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Temporal Modulation Transfer Function (TMTF).
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Effect of Modulation depth.
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Effect of (mild and flat) hearing loss.