Masking release for consonant features in temporally fluctuating background noise

Füllgrabe, Christian; Berthommier, Frédéric; Lorenzi, Christian

doi:10.1016/j.heares.2005.09.001

Cited by 113 publications

(136 citation statements)

References 49 publications

Supporting

Mentioning

118

Contrasting

Order By: Relevance

“…However, the ability to use envelope cues remains largely intact, explaining the preserved intelligibility of intact speech in quiet. As described in the introduction, E cues alone lead to poor intelligibility for normal-hearing subjects when a fluctuating background sound is present (13)(14)(15)(16)(17). This is consistent with the idea that TFS is important for listening in the dips and that the inability of hearing impaired subjects to use TFS cues is at least partly responsible for their reduced ability to understand speech in fluctuating backgrounds.…”

supporting

confidence: 79%

“…The fact that hearingimpaired people can achieve high levels of speech understanding for speech in quiet using E cues alone suggests that their difficulties in speech perception in noise do not stem from a basic difficulty in using E cues. However, for normal-hearing listeners, the intelligibility of speech based on E cues alone is very poor when a fluctuating background sound such as a single talker or an amplitude modulated noise is present (13)(14)(15)(16)(17); presumably, the same would apply for hearing-impaired listeners. This suggests that E cues alone do not allow effective listening in the dips of a background sound.…”

mentioning

confidence: 99%

“…To assess whether the loss of ability to use TFS could explain the reduced ability of the hearing impaired to exploit dips in background sounds, the seven subjects from the young hearingimpaired group were assessed for their ability to understand intact nonsense syllables in a steady background noise and in a background noise that was sinusoidally amplitude modulated at an 8-Hz rate with a 100% depth, as described in (17). The speech-to-noise ratio was fixed individually at the level yielding Ϸ50% correct identification for the speech in steady noise.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Speech perception problems of the hearing impaired reflect inability to use temporal fine structure

Lorenzi

Gilbert

Carn

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

510

496

View full text Add to dashboard Cite

People with sensorineural hearing loss have difficulty understanding speech, especially when background sounds are present. A reduction in the ability to resolve the frequency components of complex sounds is one factor contributing to this difficulty. Here, we show that a reduced ability to process the temporal fine structure of sounds plays an important role. Speech sounds were processed by filtering them into 16 adjacent frequency bands. The signal in each band was processed by using the Hilbert transform so as to preserve either the envelope (E, the relatively slow variations in amplitude over time) or the temporal fine structure (TFS, the rapid oscillations with rate close to the center frequency of the band). The band signals were then recombined and the stimuli were presented to subjects for identification. After training, normal-hearing subjects scored perfectly with unprocessed speech, and were Ϸ90% correct with E and TFS speech. Both young and elderly subjects with moderate flat hearing loss performed almost as well as normal with unprocessed and E speech but performed very poorly with TFS speech, indicating a greatly reduced ability to use TFS. For the younger hearing-impaired group, TFS scores were highly correlated with the ability to take advantage of temporal dips in a background noise when identifying unprocessed speech. The results suggest that the ability to use TFS may be critical for ''listening in the background dips.'' TFS stimuli may be useful in evaluating impaired hearing and in guiding the design of hearing aids and cochlear implants.background noise ͉ dip listening ͉ hearing impairment ͉ speech intelligibility

show abstract

supporting

confidence: 79%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Speech perception problems of the hearing impaired reflect inability to use temporal fine structure

Lorenzi

Gilbert

Carn

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

510

496

View full text Add to dashboard Cite

show abstract

“…As noted in the introduction, the task of identifying speech in fluctuating backgrounds requires the ability to discern TFS (Qin and Oxenham 2003;Füllgrabe et al 2006). The mechanisms required to do well on Schroeder-phase discrimination are apparently not the same as the mechanisms required to do well on speech discrimination in fluctuating backgrounds.…”

Section: Discussionmentioning

confidence: 99%

“…Acoustic temporal fine structure (TFS) has been shown to be critical for good performance in difficult listening tasks, such as music perception , speech perception in fluctuating background noise (Nelson et al 2003;Qin and Oxenham 2003;Zeng et al 2005;Füllgrabe et al 2006), and localization and binaural unmasking ). Rosen (1992) defined TFS in terms of the TFS cues that are important for speech between about 0.6 and 10 kHz.…”

Section: Introductionmentioning

confidence: 99%

Discrimination of Schroeder-Phase Harmonic Complexes by Normal-Hearing and Cochlear-Implant Listeners

Drennan

Longnion

Ruffin

et al. 2007

JARO

View full text Add to dashboard Cite

The temporal fine structure (TFS) of sound contributes significantly to the perception of music and speech in noise. The evaluation of new strategies to improve TFS delivery in cochlear implants (CIs) relies upon the assessment of fine structure encoding. Most modern CI sound processing schemes do not encode withinchannel TFS per se, but some TFS information is delivered through temporal envelope cues across multiple channels. Positive and negative Schroeder-phase harmonic complexes differ primarily in acoustic TFS and provide a potential test of TFS discrimination ability in CI users for current and future processing strategies. The ability to discriminate Schroeder-phase stimuli was evaluated in 24 CI users and 7 normal-hearing listeners at four fundamental frequencies: 50, 100, 200, and 400 Hz. The dependent variables were percent correct at each fundamental frequency, average score across all fundamental frequencies, and a maximum-likelihoodpredicted threshold fundamental frequency for 75% correct. CI listeners scored better than chance for all fundamental frequencies tested. The 50-Hz, average, and predicted threshold scores correlated significantly with consonant-nucleus-consonant word scores. The 200-Hz score correlated with a measure of speech perception in speech-shaped noise. Pitch-direction sensitivity is predicted jointly by the 400-Hz Schroeder score and a spectral ripple discrimination task. The results demonstrate that the Schroeder test is a potentially useful measure of clinically relevant temporal processing abilities in CI users.

show abstract

References

2007

Cochlear Hearing Loss

View full text Add to dashboard Cite

Masking release for consonant features in temporally fluctuating background noise

Cited by 113 publications

References 49 publications

Speech perception problems of the hearing impaired reflect inability to use temporal fine structure

Speech perception problems of the hearing impaired reflect inability to use temporal fine structure

Discrimination of Schroeder-Phase Harmonic Complexes by Normal-Hearing and Cochlear-Implant Listeners

References

Contact Info

Product

Resources

About