Auditory Model-Based Dynamic Compression Controlled by Subband Instantaneous Frequency and Speech Presence Probability Estimates

Comparison of Behavioral and Physiological Measures of the Status of the Cochlear Nonlinearity

“…However, the same estimates could not predict performance in timereversed two-talker babble, nor subjective hearing-aid benefit (Johannesen et al, 2016;Lopez-Poveda et al, 2017). In Kortlang et al (2016), a model-based compressor, designed to restore BM I/O functions in HI listeners, performed similarly to linear gain and a solution based on National Acoustic Laboratories' nonlinear fitting procedure, version 1 (NAL-NL1) in terms of speech intelligibility in noise across several conditions, thus casting doubt on the utility of estimating the BM I/O characteristics in individual listeners. However, the BM I/O estimation and restoration in that study were based on an audiogram and categorical loudness scaling (ACALOS, Brand & Hohmann, 2002) data from Ju¨rgens et al (2011), who compared the ACALOS parameter estimates to cochlear compression estimates obtained from the TMC method.…”

“…Several researchers have suggested that individual estimates of cochlear compression, such as CE, are likely to improve predictions of suprathreshold performance and hearing-aid fitting procedures ( Johannesen & Lopez-Poveda, 2008 ; Mills et al., 2007 ; Mueller & Janssen, 2004 ). However, studies along these lines have reported mixed findings ( Johannesen et al., 2016 ; Kortlang et al., 2016 ; Lopez-Poveda et al., 2017 ). For instance, while behavioral CE estimates, obtained from temporal-masking curves (TMCs, Nelson et al., 2001 ), were found to be important predictors of speech intelligibility in speech-shaped noise, hearing thresholds did not predict the performance in this case.…”

“…However, the same estimates could not predict performance in time-reversed two-talker babble, nor subjective hearing-aid benefit ( Johannesen et al., 2016 ; Lopez-Poveda et al., 2017 ). In Kortlang et al. (2016) , a model-based compressor, designed to restore BM I/O functions in HI listeners, performed similarly to linear gain and a solution based on National Acoustic Laboratories' nonlinear fitting procedure, version 1 (NAL-NL1) in terms of speech intelligibility in noise across several conditions, thus casting doubt on the utility of estimating the BM I/O characteristics in individual listeners.…”