ShareEXPANSION TYPE ATTENUATOR.
[In Japanese. / En japonais.]
Author(s) : HIRAKI Y.
Type of article: Article
Summary
AS DISTINCT FROM OTHER TYPES OF SOUND ATTENUATOR, THE EXPANSION-TYPE SOUND ATTENUATOR IS FEATURED BY THE AIR DUCT, WHICH IS PARTIALLY EXPANDED TO HAVE A LARGE SOUND-ENERGY DAMPING CAPACITY IN THE LOW-FREQUENCY REGION (63-125 HERTZ) UTILIZING ABSORPTION AND REFLECTION OF SOUND WAVES. BECAUSE OF THE LARGE QUANTITY OF SOUND-ATTENUATING MATERIALS, HIGH SOUND-ATTENUATING RESULTS ARE AVAILABLE IN MEDIUM-AND HIGH-FREQUENCY REGIONS AS WELL, WHERE PRESSURE LOSS AND SELF-EXCITED SOUND LEVELS ARE SUCCESSFULLY KEPT LOW.
Details
- Original title: [In Japanese. / En japonais.]
- Record ID : 1990-2525
- Languages: Japanese
- Source: Refrigeration - vol. 65 - n. 746
- Publication date: 1989
- Document available for consultation in the library of the IIR headquarters only.
Links
See other articles in this issue (5)
See the source
Indexing
- Themes: Other air-conditioning equipment
- Keywords: Noise; Performance; Duct; Air conditioning
-
Study on the sound insulation efficiency of duc...
- Author(s) : MAEDA Y., SHIRAKI S., YASUOKA M.
- Date : 1996/10
- Languages : Japanese
- Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 63
View record
-
Noise criteria: how low can one go?
- Author(s) : PEARCE R. P. B.
- Date : 1992/09
- Languages : English
- Source: S. A. Refrig. Aircond. - vol. 8 - n. 5
View record
-
TERMINAL NOISE FROM AIR CONDITIONING SYSTEMS.
- Author(s) : BRIDGES J. F.
- Date : 1983/10
- Languages : English
- Source: J. chart. Inst. Build. Serv. - vol. 5 - n. 10
View record
-
Active noise control in ventilation.
- Author(s) : BUNN R.
- Date : 1997/06
- Languages : English
- Source: Build. Serv. J. - vol. 19 - n. 6
View record
-
NOISE INGRESS THROUGH VENTS.
- Author(s) : JORRO S.
- Date : 1991/11
- Languages : English
- Source: J. chart. Inst. Build. Serv. - vol. 13 - n. 11
View record