Loudness and auditory steady-state responses in normal-hearing subjects

Castro, Franz Zenker; Prat, José Juan Barajas de; Larumbe-Zabala, Eneko

doi:10.1080/14992020801945501

Cited by 13 publications

(3 citation statements)

References 33 publications

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“…Significant correspondence between ASSR and loudness growths has been found for normal-hearing (Ménard et al, 2008;Zenker Castro et al, 2008;Eeckhoutte et al, 2016) and hearing-impaired subjects (Eeckhoutte et al, 2018). For low-modulation rates (near 40 Hz and below), contributions from the auditory cortex to the ASSR are thought to be prominent (Picton et al, 2003;Alaerts et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Archives of Acoustics

Jurado¹,

Marquardt

2020

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Complaints and awareness about environmental low-frequency (LF) noise and infrasound (IS) have increased in recent years, but knowledge about perceptual mechanisms is limited. To evaluate the use of the brain's frequency-following response (FFR) as an objective correlate of individual sensitivity to IS and LF, we recorded the FFR to monaurally presented IS (11 Hz) and LF (38 Hz) tones over a 30-phon range for 11 subjects. It was found that 11-Hz FFRs were often significant already at ∼0 phon, steeply grew to 20 phon, and saturated above. In contrast, the 38-Hz FFR growth was relatively shallow and continued to 60 phon. Furthermore, at the same loudness level (30 phon), the 11-Hz FFR strength was significantly larger (4.5 dB) than for 38 Hz, possibly reflecting a higher phase synchronization across the auditory pathway. Overall, unexpected inter-individual variability as well as qualitative differences between the measured FFR growth functions and typical loudness growth make interpretation of the FFR as objective correlate of IS and LF sensitivity difficult.

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Section: Introductionmentioning

confidence: 99%

Archives of Acoustics

Jurado¹,

Marquardt

2020

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“…The large intersubject variation in ASSR signal-to-noise ratios (SNRs) complicates estimating precise behavioral thresholds from the ASSR ( Michel & Jørgensen, 2017 ; Rodrigues & Lewis, 2013 ). However, if a HA reduces ASSR thresholds in hearing impaired persons down to acceptable levels, it can be understood that the HA is well fit to the patient and that their aided absolute hearing thresholds are likely also improved ( Zenker-Castro & Barajas de Prat, 2008 ). Several methods for ASSR detection exist ( Cebulla et al., 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Potential Destructive Binaural Interaction Effects in Auditory Steady-State Response Measurements

Watson¹,

Laugesen

Epp³

2021

Trends in Hearing

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An aided sound-field auditory steady-state response (ASSR) has the potential to be used to objectively validate hearing-aid (HA) fittings in clinics. Each aided ear should ideally be tested independently, but it is suspected that binaural testing may be used by clinics to reduce test time. This study simulates dichotic ASSR sound-field conditions to examine the risk of making false judgments due to unchecked binaural effects. Unaided ASSRs were recorded with a clinical two-channel electroencephalography (EEG) system for 15 normal hearing subjects using a three-band CE-Chirp® stimulus. It was found that the noise corrected power of a response harmonic can be suppressed by up to 10 dB by introducing large interaural time differences equal to half the time period of the stimulus envelope, which may occur in unilateral HA users. These large interaural time differences also changed the expression of ASSR power across the scalp, resulting in dramatically altered topographies. This would lead to considerably lower measured response power and possibly nondetections, evidencing that even well fit HAs are fit poorly (false referral), whereas monaural ASSR tests would pass. No effect was found for simulated lateralizations of the stimulus, which is beneficial for a proposed aided ASSR approach. Full-scalp ASSR recordings match previously found 40 Hz topographies but demonstrate suppression of cortical ASSR sources when using stimuli in interaural envelope antiphase.

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“…This makes it rather difficult to distinguish whether a neural response is better correlated with one or the other. Previous studies typically tried to detect compression effects in the neural response, to distinguish loudness from sound intensity (Behler & Uppenkamp, 2016;Castro, de Prat, & Zabala, 2008;Eeckhoutte, Wouters, & Francart, 2016;Emara & Kolkaila, 2010;M enard, Gall ego, Berger-Vachon, Collet, & Thai-Van, 2008). However, it is not clear if a more compressed representation of the stimulus in the auditory pathway is necessarily indicating an earlier loudness processing, in particular when considering (a) that it can be assumed that a major part of the compression of the auditory dynamic range takes place in the cochlea and (b) the possibility of central expansion in loudness processing (see, e.g., Zhang & Zeng, 1997).…”

Section: Introductionmentioning

confidence: 99%

Neural Representation of Loudness: Cortical Evoked Potentials in an Induced Loudness Reduction Experiment

2020

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Loudness context effects comprise differences in judgments of the loudness of a target stimulus depending on the presence of a preceding inducer tone. Interstimulus intervals (ISIs) between inducer tone and target tone of about 200 ms and above cause an induced loudness reduction (ILR) of the target tone. As the ILR increases, respectively, the perceived loudness of the target stimuli decreases with increasing ISI. This in turn means that identical stimuli in a different context have a differently perceived loudness. A correlation between specific characteristics in the electroencephalography responses and perceived loudness in an ILR experiment would therefore provide a neurophysiological indication of loudness processing beyond a neural representation of stimulus intensity only. To examine if such a correlation exists, we investigated cortical electroencephalography responses in a latency range from 75 to 510 ms during a psychoacoustical ILR experiment with different ISIs. With increasing ISI, the strength of the N1-P2 deflection of the respective electroencephalography response decreases similarly to the loudness perception of the target tone pulse. This indicates a representation based on loudness rather than on intensity at the corresponding processing stage.

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Loudness and auditory steady-state responses in normal-hearing subjects

Cited by 13 publications

References 33 publications

Archives of Acoustics

Archives of Acoustics

Potential Destructive Binaural Interaction Effects in Auditory Steady-State Response Measurements

Neural Representation of Loudness: Cortical Evoked Potentials in an Induced Loudness Reduction Experiment

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