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A collection of software, research, history, reflections, and data related to auditory models.
chronological history of HSR papers (If you are logged in, you will see the details.)
The research in the Human Speech Recognition group is directed at a fundamental understanding of speech perception in both normal-hearing (NH) and Hearing-Impaired ears. These are related problems, and are actually a continiuium, not two separate things. Most people are born with normal hearing. Within a few years we learn, without seeming effort, to understand human speech. How this happens is a mystery. But what happens is not a mystery. The research we have been doing over the past 10 years, as documented in the section below, is a systematic study of the nature of the failure to process and communicate under various conditions. Only by stressing the system, causing failure, can we hope to understand it.
Examples of such processing are given in later on this page.
We have found that speech perception is a discrete (binary) zero error task Singh and Allen, 2012. Working at the token level, we defined 2 groups: ZE, NZE. Zero-Error (ZE) speech is defined as speech that NH listeners never make an error in identifying, at and above above -2 dB SNR. The non-ZE (NZE) sounds are all the rest. All of the speech CV sounds that we have tested contain many ZE tokens: most CV consonants consist of more than 80% ZE utterances.
The remaining 20% of the CVs may be broken down into 0% < medium-error (ME) <10% and >10% high-error (HE) groups. ME consonants are typically utterances having varying degrees of mispronounced utterances. HE consonants are typically those that are heard as a different sound, with high probability (>20%). Based on the entropy across normal hearing listeners, we view such sounds as mislabled. The reasons for these errors can typically be traced to a specific flaw in the production of the sound, which is typically easily identified.
|2004||MN04SWN/MN64||Phatak & Lovitt||Repeat Miller Nicely, 1955 [MN55] with SWN||Phatak & Allen (2007) [PA07]|
|2005||Study||Allen, J. B.||"Consonant recognition and the articulation index,"||JASA 117(4), p. 2212-2223. (2005) pdf|
|2005||MN05WN (MN16R)||Phatak & Lovitt||Replicate MN04 (WN)||Phatak, Lovitt & Allen (2008)|
|2005||MN05SWN (MN64)||Phatak & Lovitt||Repeat of MN64 for increasing number of subjects(SWN)|
|2005||HIMCL05||Yoon & Phatak||CVs in 10 HI ears @ MCL in WN||Phatak, Yoon, Gooler & Allen (2009)|
|2006||HINALR05||Yoon||CVs in 10 HI ears with NALR@MCL in SWN|
|2006||Verification||Regnier||Modifications of /ta/||Regnier & Allen (2008)|
|2006||CV06SWN||Phatak||9C+8V SWN /d, b, k, p, s, t, xs, xz, z/|
|2006||CV06WN||Regnier||9C+8V WN /d, b, k, p, s, t, xs, xz, z/|
|2007||CV06||Pan||Analysis of 9 Vowels of CV06||2 unpublished MSs|
|2007||HL07||Li||High and Low pass Repeat of Fletcher||Li Allen (2009), JASA|
|2008||TR07||Li||Time Truncation after Furui86||Allen Li (2009) ASSP Magazine|
|2008||TR08||Li||Time Truncation after Furui86||? 3 vowels ?|
|2009||3DDS||Li||Put 3 experiments into one (MN64, HL07, TR07-8)||Li Allen (2010) JASA; |
Li Allen (2010) IEEE TLSP;
Li Trevino, Allen (2012) Oct JASA
|2009||Verification||Menon||Remove Primary burst|
|2009||Verification||Abhinauv||Modify (6 dB)+Remove Primary burst||Kapoor and Allen, 131(1), 2012|
|2009||Verification||Cvengros||Modify burst + devoiced + voiced transition||JASA, Under Review|
|2009||mn64 high error analysis||Singh||Account for the High error sounds removed in PA07||JASA, April 2012|
|2010||HIMCL10-I/-III||Woojae Han||Basic CV experiments on 46 HI ears wiht N=4/Consonant||EH submitted|
|2010||HI10NALR-II/-IV||Woojae Han||Basic CV experiments on 17 HI ears with N=20/Consonant|
|2011||HL11||Trevino||High/Low filter CVs of HI10|