| Presentation | 2004/8/12 Effect of dichotic presentation on speech intelligibility and on sound localization by elderly people Atsunobu MURASE, Fumie NAKAJIMA, Shuichi SAKAMOTO, Yoiti SUZUKI, Tetsuaki KAWASE, Toshimitsu KOBAYASHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Sensorineural hearing loss is commonly accompanied by reduced frequency selectivity and temporal resolution. The reduction of frequency selectivity engenders remarkable disadvantages through masking, particularly masking of middle and high frequency components by intense low frequency components: the so-called upward spread of masking. By splitting into two complimentary parts in terms of frequency spectra to reduce masking between contiguous frequency bands and presenting it dichotically might improve speech intelligibility. This paper investigates sound image localization perceived in dichotic listening condition, as well as speech intelligibility. In a dichotic listening condition, speech signals were divided into two frequency bands by considering formant frequencies of Japanese vowels. (1)Results of a speech intelligibility test using vowel/u/-consonant-vowel nonsense syllables showed that improvement in intelligibility was observed when the dividing frequency was 0.8 kHz (between Fl and F2 of Japanese vowel /u/). (2)Results of a sound image localization test in dichotic presentation showed that hearing impaired listeners tend to localize sound stimuli to the side from which the low frequency part was presented. (3)It is possible to improve those sound localization errors in dichotic presentation by applying interaural time difference(ITD) as time-intensity trading. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Dichotic listening / Upward masking / Sound localization / Speech intelligibility |
| Paper # | EA2004-36 |
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| Committee | EA |
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| Conference Date | 2004/8/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Effect of dichotic presentation on speech intelligibility and on sound localization by elderly people |
| Sub Title (in English) | |
| Keyword(1) | Dichotic listening |
| Keyword(2) | Upward masking |
| Keyword(3) | Sound localization |
| Keyword(4) | Speech intelligibility |
| 1st Author's Name | Atsunobu MURASE |
| 1st Author's Affiliation | Research Institute of Electric Communications and G. S. I. S., Tohoku University : Matsushita Electric Industrial Co., Ltd() |
| 2nd Author's Name | Fumie NAKAJIMA |
| 2nd Author's Affiliation | Research Institute of Electric Communications and G. S. I. S., Tohoku University : (Present address)JR East Japan Information Systems Company |
| 3rd Author's Name | Shuichi SAKAMOTO |
| 3rd Author's Affiliation | Research Institute of Electric Communications and G. S. I. S., Tohoku University |
| 4th Author's Name | Yoiti SUZUKI |
| 4th Author's Affiliation | Research Institute of Electric Communications and G. S. I. S., Tohoku University |
| 5th Author's Name | Tetsuaki KAWASE |
| 5th Author's Affiliation | Departments of Otolaryngology, Tohoku University Graduate School of Medicine |
| 6th Author's Name | Toshimitsu KOBAYASHI |
| 6th Author's Affiliation | Departments of Otolaryngology, Tohoku University Graduate School of Medicine |
| Date | 2004/8/12 |
| Paper # | EA2004-36 |
| Volume (vol) | vol.104 |
| Number (no) | 246 |
| Page | pp.pp.- |
| #Pages | 6 |
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