Amplitude modulation detection and temporal modulation cutoff frequency in normal hearing infants

Walker, Brian A; Gerhards, Caitlin M.; Werner, Lynne A.; Horn, David L.

doi:10.1121/1.5111757

Cited by 16 publications

(23 citation statements)

References 48 publications

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“…showed that auditory sensitivity to sinusoidal AM, as measured by detection thresholds, improves with age between 5 and 10 years, but that AM sensitivity was similarly affected by AM rate (ranging from 5 to 200 Hz) at all ages. This suggests that sensory factors constraining temporal resolution are mature early on, as also suggested by studies with young infants (Walker et al, 2019). However, in a recent similar study, Buss et al (2019) found evidence that temporal resolution may be poorer in children than in adults for low AM rates.…”

Section: Introductionmentioning

confidence: 74%

Temporal integration for amplitude modulation in childhood: Interaction between internal noise and memory

Cabrera

Lorenzini

Rosen³

et al. 2022

Hearing Research

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It is still unclear whether the gradual improvement in amplitude-modulation (AM) sensitivity typically found in children up to 10 years of age reflects an improvement in "processing efficiency" (the central ability to use information extracted by sensory mechanisms). This hypothesis was tested by evaluating temporal integration for AM, a capacity relying on memory and decision factors. This was achieved by measuring the effect of increasing the number of AM cycles (2 vs 8) on AM-detection thresholds for three groups of children aged from 5 to 11 years and a group of young adults. AMdetection thresholds were measured using a forced-choice procedure and sinusoidal AM (4 or 32 Hz rate) applied to a 1024-Hz pure-tone carrier. All age groups demonstrated temporal integration for AM at both rates; that is, significant improvements in AM sensitivity with a higher number of AM cycles. However, an effect of age is observed as both 5-6 year olds and adults exhibited more temporal integration compared to 7-8 and 10-11 year olds at both rates. This difference is due to: (i) the 5-6 year olds displaying the worst thresholds with 2 AM cycles, but similar thresholds with 8 cycles compared to the 7-8 and 10-11 year olds, and, (ii) adults showing the best thresholds with 8 AM cycles but similar thresholds with 2 cycles compared to the 7-8 and 10-11 year olds. Computational modelling indicated that higher levels of internal noise combined with poorer short-term memory capacities in children accounted for the developmental trends. Improvement in processing efficiency may therefore account for the development of AM detection in childhood.

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Section: Introductionmentioning

confidence: 74%

Temporal integration for amplitude modulation in childhood: Interaction between internal noise and memory

Cabrera

Lorenzini

Rosen³

et al. 2022

Hearing Research

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show abstract

“…That is, the higher the AM rate, the worse the AM detection threshold. This effect of AM rate on AM sensitivity suggests that factors constraining the temporal resolution of the human auditory system (the limit in the ability to follow (i.e., resolve) fast AM fluctuations) are probably mature early on and probably during infancy (Levi & Werner, 1996;Walker, Gerhards, Werner & Horn, 2019;Werner, 1996). In a recent study, Buss et al, (2019) measured AM detection thresholds for 5-to-11-year-old children and adults using a 4300 Hz pure tone carrier modulated at 3 different AM rates (16,64 and 256 Hz).…”

Section: B Development Of Temporal Auditory Processingmentioning

confidence: 99%

Development of temporal auditory processing in childhood: Changes in efficiency rather than temporal-modulation selectivity

Cabrera

Varnet

Buss

et al. 2019

The Journal of the Acoustical Society of America

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The ability to detect amplitude modulation (AM) is essential to distinguish the spectro-temporal features of speech from those of a competing masker. Previous work shows that AM sensitivity improves until 10 years of age. This may relate to the development of sensory factors (tuning of AM filters, susceptibility to AM masking) or to changes in processing efficiency (reduction in internal noise, optimization of decision strategies). To disentangle these hypotheses, three groups of children (5-11 years) and one of young adults completed psychophysical tasks measuring thresholds for detecting sinusoidal AM (with a rate of 4, 8, or 32 Hz) applied to carriers whose inherent modulations exerted different amounts of AM masking. Results showed that between 5 and 11 years, AM detection thresholds improved and that susceptibility to AM masking slightly increased. However, the effects of AM rate and carrier were not associated with age, suggesting that sensory factors are mature by 5 years. Subsequent modelling indicated that reducing internal noise by a factor 10 accounted for the observed developmental trends. Finally, children's consonant identification thresholds in noise related to some extent to AM sensitivity. Increased efficiency in AM detection may support better use of temporal information in speech during childhood.

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“…The post-natal development of processing of temporal modulations has been already investigated in several mammalian species, e.g. gerbils (Heil et al, 1995;Khurana et al, 2012), mice (Müller et al, 2019), harbour porpoises (Linnenschmidt et al, 2013) and in humans (Draganova et al, 2018;Rance et al, 2006;Walker et al, 2019). However, data for bats are lacking so far.…”

Section: Introductionmentioning

confidence: 99%

Post-natal development of the envelope following response to amplitude modulated sounds in the bat Phyllostomus discolor

Hörpel

Firzlaff

2020

Hearing Research

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Bats use a large repertoire of calls for social communication, which are often characterized by temporal amplitude and frequency modulations. As bats are considered to be among the few mammalian species capable of vocal learning, the perception of temporal sound modulations should be crucial for juvenile bats to develop social communication abilities. However, the post-natal development of auditory processing of temporal modulations has not been investigated in bats, so far. Here we use the minimally invasive technique of recording auditory brainstem responses to measure the envelope following response (EFR) to sinusoidally amplitude modulated noise (range of modulation frequencies: 11e130 Hz) in three juveniles (p8-p72) of the bat, Phyllostomus discolor. In two out of three animals, we show that although amplitude modulation processing is basically developed at p8, EFRs maturated further over a period of about two weeks until p33. Maturation of the EFR generally took longer for higher modulation frequencies (87e130 Hz) than for lower modulation frequencies (11e58 Hz).

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Amplitude modulation detection and temporal modulation cutoff frequency in normal hearing infants

Cited by 16 publications

References 48 publications

Temporal integration for amplitude modulation in childhood: Interaction between internal noise and memory

Temporal integration for amplitude modulation in childhood: Interaction between internal noise and memory

Development of temporal auditory processing in childhood: Changes in efficiency rather than temporal-modulation selectivity

Post-natal development of the envelope following response to amplitude modulated sounds in the bat Phyllostomus discolor

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