Basilar-membrane responses to tones at the base of the chinchilla cochlea

Ruggero, Mario A.; Rich, Nola C.; Recio, Alberto; Narayan, S. Shyamla; Robles, Luis

doi:10.1121/1.418265

Cited by 658 publications

(611 citation statements)

References 70 publications

Supporting

Mentioning

527

Contrasting

Unclassified

Order By: Relevance

“…Cooper & Rhode, 1992), and bring the data from the hook region BM into closer agreement with those observed in other regions of the cochlea and/or in other species (e.g. Nuttall et al 1996;Ruggero et al 1997). Sound Pressure Level (dB re: 20~Pa) Fig.…”

Section: Department Of Physiology University Of Bristol Bristol Bs81tdsupporting

confidence: 80%

Cellular Neurophysiology

1998

The Journal of Physiology

View full text Add to dashboard Cite

Section: Department Of Physiology University Of Bristol Bristol Bs81tdsupporting

confidence: 80%

Cellular Neurophysiology

1998

The Journal of Physiology

View full text Add to dashboard Cite

“…Some (Ruggero and Rich 1991;Ruggero et al 1992;Oxenham and Plack 1997;Gregan et al 1998;Bacon et al 1999;Nelson et al 2001;Yasin and Plack 2003), although not all (Bacon and Viemeister 1985;Murugasu and Russell 1995;Ruggero et al 1997) physiological and psychophysical studies show that the slope of the I/O function or GOM function returns to a value of 1 dB/dB for high-level signals. The implication being that for high-level signals the BM response to both the signal and masker may grow linearly at the signal place, as is the case for low-level signals (Delgutte 1990a;Yates et al 1990).…”

Section: The Growth Of Masking and Compressionmentioning

confidence: 99%

“…A return to linearity at high levels could also be explained by the level-dependent shift of the peak of the signal excitation pattern toward the basal region of the BM (McFadden and Yama 1983). At high levels, the peak of the traveling wave grows more linearly than the CF response (e.g., Ruggero et al 1997). Another possibility is that intense masker levels activate the middle ear reflex.…”

Section: The Growth Of Masking and Compressionmentioning

confidence: 99%

“…The active mechanism is responsible for the compressive growth of the BM response for a mid-level signal with a frequency close to the characteristic frequency (CF) of the BM place of recording (Ruggero et al 1997). In contrast, the BM response for a signal frequency of about 0.7CF or less grows linearly (slope close to 1 dB/dB; Ruggero et al 1997). Compressive and suppressive responses have also been measured in auditory neurons (Cooper and Yates 1994;Delgutte 1990a;Pang and Guinan 1997).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Role of Suppression in the Upward Spread of Masking

Yasin

Plack

2005

JARO

View full text Add to dashboard Cite

The upward spread of masking refers to the higher growth rate of masking for maskers lower in frequency than the signal, compared to maskers at the signal frequency (Wegel RL, Lane CE. The auditory masking of one pure tone by another and its possible relation to the dynamics of the inner ear. Physics Rev. 23:266-285, 1924; Egan JP, Hake HW. On the masking pattern of a simple auditory stimulus. J. Acoust. Soc. Am. 22:622-630, 1950; Delgutte B. Physiological mechanisms of psychophysical masking: Observations from auditory-nerve fibres. J. Acoust. Soc. Am. 87:791-809, 1990a, Delgutte B. Two-tone rate suppression in auditory-nerve fibres: Dependence on suppressor frequency and level. Hear Res. 49:225-246, 1990b). The upward spread of simultaneous masking may arise from a combination of excitatory and suppressive effects. In this study, growth of masking functions were obtained for a 4-kHz signal masked by an on-frequency (4 kHz) or offfrequency (2.4 kHz), simultaneous or forward masker, in the presence of a notched noise with a center frequency of 4 kHz presented to restrict off-frequency listening. Compression was estimated from the slopes of the off-frequency growth of masking functions. Suppression was estimated by comparing the offfrequency simultaneous-and forward-masked growth of masking functions. Results showed that, for midlevel signals (35-60 dB SPL), the compression exponent estimated from simultaneous and forward masking averaged 0.31 and 0.26, respectively. The maximum amount of suppression (defined as the decrease in the basilar-membrane response to the signal) was variable, ranging from about 6 to 17 dB across subjects. Despite the substantial reduction in the response to the signal, the results suggest that suppression has a minimal effect on the slope of the masking function at mid levels. Rather, upward spread of masking seems to be mainly determined by the compressive basilar-membrane response to the signal in relation to the linear response to the lowerfrequency masker.

show abstract

“…Cochlear processing has often been modeled as a bank of overlapping filters with center frequencies representing specific sites along the basilar membrane (BM), with bandwidths dependent on the characteristic frequency (CF) and stimulus level (Lopez-Poveda and Meddis, 2001;Zhang et al, 2001;Irino and Patterson, 2006). The models have been developed based on findings from direct mechanical measurements in experimental animals that were performed primarily at basal sites of the cochlea, which can be accessed with little effect on the cochlea's physiological function (Rhode, 1971;Rhode and Robles, 1974;Robles et al, 1986;Ruggero et al, 1997;Robles and Ruggero, 2001;Rhode, 2007). Only a few studies have provided data from apical sites, and those have acknowledged that the response characteristics might have been compromised by the procedures used to gain physical access to the apex Rhode, 1995, 1996;Rhode and Cooper, 1996;Khanna and Hao, 1999;Zinn et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Perception of across-frequency asynchrony and the role of cochlear delays

Wojtczak

Beim

Micheyl

et al. 2012

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Cochlear filtering results in earlier responses to high than to low frequencies. This study examined potential perceptual correlates of cochlear delays by measuring the perception of relative timing between tones of different frequencies. A brief 250-Hz tone was combined with a brief 1-, 2-, 4-, or 6-kHz tone. Two experiments were performed, one involving subjective judgments of perceived synchrony, the other involving asynchrony detection and discrimination. The functions relating the proportion of "synchronous" responses to the delay between the tones were similar for all tone pairs. Perceived synchrony was maximal when the tones in a pair were gated synchronously. The perceived-synchrony function slopes were asymmetric, being steeper on the low-frequency-leading side. In the second experiment, asynchrony-detection thresholds were lower for low-frequency rather than for high-frequency leading pairs. In contrast with previous studies, but consistent with the first experiment, thresholds did not depend on frequency separation between the tones, perhaps because of the elimination of within-channel cues. The results of the two experiments were related quantitatively using a decision-theoretic model, and were found to be highly correlated. Overall the results suggest that frequency-dependent cochlear group delays are compensated for at higher processing stages, resulting in veridical perception of timing relationships across frequency.

show abstract

Basilar-membrane responses to tones at the base of the chinchilla cochlea

Cited by 658 publications

References 70 publications

Cellular Neurophysiology

Cellular Neurophysiology

The Role of Suppression in the Upward Spread of Masking

Perception of across-frequency asynchrony and the role of cochlear delays

Contact Info

Product

Resources

About