| IEICE Technical Committee Submission System Conference Paper's Information |
Online Proceedings [Sign in] Tech. Rep. Archives |
| Go Top Page | Go Previous | [Japanese] / [English] |
| Paper Abstract and Keywords | ||
| Presentation | Acoustic characteristics of Non-Audible Murmur and NAM Microphone Response Shota Shimizu, Makoto Otani, Tatsuya Hirahara (Toyama Pref. Univ.)  SP2007-38 |
|
| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Acoustic characteristics of Non-Audible Murmur (NAM) and response characteristics of soft-silicon type NAM microphone are clarified. The NAM is a very weak whispered body-couducted voice, which can be detected by specially designed microphone attached to the neck surface. Individual differences of three NAM microphones are small. Frequency response of NAM microphone decays at -17 dB/octave. NAM microphone sensitivity is about -36 dB (1 V/1 Pa = 0 dB @1 kHz). NAM signals were recorded from 26 male and 17 female speakers; total amount of the data is about 630 minutes. The signal-to-noise ratio of NAM signals is about 16 dB with 8 kHz bandwidth. Band width of the NAM signal is about 3 kHz. Long-term averaged Spectrum (LTAS) of NAM signals show energy concentration around 500 to 800 Hz and a -17 dB/octave roll off. After compensating the NAM microphone response, the LTAS of the raw NAM signals show energy concentration around 200 to 300 Hz and a -23 dB/octave roll off. This result roughly corresponds to the numerical simulation of transfer characteristics of sound propagating in head and neck. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Non-Audible-Murmur(NAM) / NAM microphones / Acoustic characteristics / Frequency response / Long-term averaged Spectrum(LTAS) / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 165, SP2007-38, pp. 85-90, July 2007. | |
| Paper # | SP2007-38 | |
| Date of Issue | ||
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | SP2007-38 |
|
| Conference Information | |
| Committee | SP |
| Conference Date | 2007-07-26 - 2007-07-27 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Toyama Prefectural University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech Production, Speech Perception, Hearing and Speech, etc. |
| Paper Information | |
| Registration To | SP |
| Conference Code | 2007-07-SP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acoustic characteristics of Non-Audible Murmur and NAM Microphone Response |
| Sub Title (in English) | |
| Keyword(1) | Non-Audible-Murmur(NAM) |
| Keyword(2) | NAM microphones |
| Keyword(3) | Acoustic characteristics |
| Keyword(4) | Frequency response |
| Keyword(5) | Long-term averaged Spectrum(LTAS) |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Shota Shimizu |
| 1st Author's Affiliation | Toyama Prefectural University (Toyama Pref. Univ.) |
| 2nd Author's Name | Makoto Otani |
| 2nd Author's Affiliation | Toyama Prefectural University (Toyama Pref. Univ.) |
| 3rd Author's Name | Tatsuya Hirahara |
| 3rd Author's Affiliation | Toyama Prefectural University (Toyama Pref. Univ.) |
| 4th Author's Name | |
| 4th Author's Affiliation | () |
| 5th Author's Name | |
| 5th Author's Affiliation | () |
| 6th Author's Name | |
| 6th Author's Affiliation | () |
| 7th Author's Name | |
| 7th Author's Affiliation | () |
| 8th Author's Name | |
| 8th Author's Affiliation | () |
| 9th Author's Name | |
| 9th Author's Affiliation | () |
| 10th Author's Name | |
| 10th Author's Affiliation | () |
| 11th Author's Name | |
| 11th Author's Affiliation | () |
| 12th Author's Name | |
| 12th Author's Affiliation | () |
| 13th Author's Name | |
| 13th Author's Affiliation | () |
| 14th Author's Name | |
| 14th Author's Affiliation | () |
| 15th Author's Name | |
| 15th Author's Affiliation | () |
| 16th Author's Name | |
| 16th Author's Affiliation | () |
| 17th Author's Name | |
| 17th Author's Affiliation | () |
| 18th Author's Name | |
| 18th Author's Affiliation | () |
| Speaker | Author-1 |
| Date Time | |
| Presentation Time | minutes |
| Registration for | SP |
| Paper # | SP2007-38 |
| Volume (vol) | vol.107 |
| Number (no) | no.165 |
| Page | pp.85-90 |
| #Pages | 6 |
| Date of Issue | |
[Return to Top Page]