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Paper Abstract and Keywords
Presentation 2005-10-21 10:00
Sound Insulation with "Hachinosu kanki" - Natural Ventilation within Honeycomb Structure
Naoya Yada, Makoto Shinohara, Kenji Furihata (Shinshu Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, the insulation efficiency for a new shape ventilation apparatus (Oriken Inc, Hachinosu Kanki) was measured. Concretely, the measurement results and the special features of normalized sound transmission loss of the Hachinosu Kanki were described. Measurements were carried out by the two-microphone method. First, three kinds of conditions: the completed ventilation apparatus, the outside part taken off and the resister only to be tested were placed in a sample holder and mounted to one of a straight tube (length: 1m, diameter: 0.2mφ). From the results, the insulation efficiency of the new shape ventilation apparatus was about 13 dB at 300 Hz, 5 dB at 420 Hz and 8 dB at 690 Hz. Second, over 800 Hz, the difference of the sound pressure levels between with the apparatus placed in a sample holder and without it was measured. From the results, the insulation efficiency of the apparatus was about 20 dB at 1600 Hz and 22 dB at 3700 Hz. Consequently, it can be said that the insulation efficient of the Hachinosu Kanki is selectively at certain frequency.
Keyword (in Japanese) (See Japanese page) 
(in English) Hachinosu kanki / transmission loss / insulation of sound characteristics / 2microphone method / high frequency band / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 348, EA2005-59, pp. 13-18, Oct. 2005.
Paper # EA2005-59 
Date of Issue 2005-10-14 (EA) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee EA  
Conference Date 2005-10-20 - 2005-10-21 
Place (in Japanese) (See Japanese page) 
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Paper Information
Registration To EA 
Conference Code 2005-10-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Sound Insulation with "Hachinosu kanki" - Natural Ventilation within Honeycomb Structure 
Sub Title (in English)  
Keyword(1) Hachinosu kanki  
Keyword(2) transmission loss  
Keyword(3) insulation of sound characteristics  
Keyword(4) 2microphone method  
Keyword(5) high frequency band  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Naoya Yada  
1st Author's Affiliation Shinshu University (Shinshu Univ.)
2nd Author's Name Makoto Shinohara  
2nd Author's Affiliation Shinshu University (Shinshu Univ.)
3rd Author's Name Kenji Furihata  
3rd Author's Affiliation Shinshu University (Shinshu Univ.)
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Speaker Author-1 
Date Time 2005-10-21 10:00:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2005-59 
Volume (vol) vol.105 
Number (no) no.348 
Page pp.13-18 
#Pages
Date of Issue 2005-10-14 (EA) 


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