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Assessment of ability to discriminate frequency of bone-conducted ultrasound by mismatch fields.
Neurosci Lett. 2008 Jun 20; 438(2):260-2.NL

Abstract

According to previous studies, ultrasound can be perceived through bone conduction and ultrasound amplitude modulated by different speech sounds can be discriminated by some profoundly deaf subjects as well as the normal-hearing. These findings suggest the usefulness of development of a bone-conducted ultrasonic hearing aid (BCUHA) for profoundly deaf subjects. In this study, with a view to developing a frequency modulation system in a BCUHA, the capability to discriminate the frequency of sinusoidal bone-conducted ultrasound (BCU) was evaluated by measuring mismatch fields (MMF). We compared MMFs between BCU (standard stimuli were 30 kHz, and deviant stimuli were 27 and 33 kHz) and air-conducted audible sound (ACAS; standard stimuli were 1 kHz, and deviant stimuli were 900 and 1100 Hz). MMFs were observed in all subjects for ACAS, however, not observed in a few subjects for BCU. Further, the mean peak amplitudes of MMF for BCU were significantly less than those for ACAS. These findings indicate that the discrimination capability of frequency of sinusoidal BCU is inferior to that of ACAS. It was also demonstrated that normal hearing could to some extent discriminate differences in frequency in sinusoidal BCU. The results indicate a possibility of transmission system for language information making use of frequency discrimination.

Authors+Show Affiliations

Department of Otolaryngology, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8522, Japan. akinori@naramed-u.ac.jpNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18455304

Citation

Yamashita, Akinori, et al. "Assessment of Ability to Discriminate Frequency of Bone-conducted Ultrasound By Mismatch Fields." Neuroscience Letters, vol. 438, no. 2, 2008, pp. 260-2.
Yamashita A, Nishimura T, Nakagawa S, et al. Assessment of ability to discriminate frequency of bone-conducted ultrasound by mismatch fields. Neurosci Lett. 2008;438(2):260-2.
Yamashita, A., Nishimura, T., Nakagawa, S., Sakaguchi, T., & Hosoi, H. (2008). Assessment of ability to discriminate frequency of bone-conducted ultrasound by mismatch fields. Neuroscience Letters, 438(2), 260-2. https://doi.org/10.1016/j.neulet.2008.03.086
Yamashita A, et al. Assessment of Ability to Discriminate Frequency of Bone-conducted Ultrasound By Mismatch Fields. Neurosci Lett. 2008 Jun 20;438(2):260-2. PubMed PMID: 18455304.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of ability to discriminate frequency of bone-conducted ultrasound by mismatch fields. AU - Yamashita,Akinori, AU - Nishimura,Tadashi, AU - Nakagawa,Seiji, AU - Sakaguchi,Takefumi, AU - Hosoi,Hiroshi, Y1 - 2008/04/08/ PY - 2007/06/25/received PY - 2007/12/21/revised PY - 2008/03/30/accepted PY - 2008/5/6/pubmed PY - 2008/9/20/medline PY - 2008/5/6/entrez SP - 260 EP - 2 JF - Neuroscience letters JO - Neurosci Lett VL - 438 IS - 2 N2 - According to previous studies, ultrasound can be perceived through bone conduction and ultrasound amplitude modulated by different speech sounds can be discriminated by some profoundly deaf subjects as well as the normal-hearing. These findings suggest the usefulness of development of a bone-conducted ultrasonic hearing aid (BCUHA) for profoundly deaf subjects. In this study, with a view to developing a frequency modulation system in a BCUHA, the capability to discriminate the frequency of sinusoidal bone-conducted ultrasound (BCU) was evaluated by measuring mismatch fields (MMF). We compared MMFs between BCU (standard stimuli were 30 kHz, and deviant stimuli were 27 and 33 kHz) and air-conducted audible sound (ACAS; standard stimuli were 1 kHz, and deviant stimuli were 900 and 1100 Hz). MMFs were observed in all subjects for ACAS, however, not observed in a few subjects for BCU. Further, the mean peak amplitudes of MMF for BCU were significantly less than those for ACAS. These findings indicate that the discrimination capability of frequency of sinusoidal BCU is inferior to that of ACAS. It was also demonstrated that normal hearing could to some extent discriminate differences in frequency in sinusoidal BCU. The results indicate a possibility of transmission system for language information making use of frequency discrimination. SN - 0304-3940 UR - https://www.unboundmedicine.com/medline/citation/18455304/Assessment_of_ability_to_discriminate_frequency_of_bone_conducted_ultrasound_by_mismatch_fields_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3940(08)00440-0 DB - PRIME DP - Unbound Medicine ER -