| Document ID (ISN) | 27920 |
| CIS number |
77-1573 |
| ISSN - Serial title |
Noise Control |
| Year |
1977 |
| Convention or series no. |
|
| Author(s) |
Finkelstein W. |
| Title |
Ideal attenuation characteristics of sound attenuators for ventilation and air conditioning plants. |
| Bibliographic information |
Mar. 1977. Vol.8, No.3, p.93-97. Illus. |
| Abstract |
Investigation to develop an attenuator with a performance optimised to match the frequency-related variation of noise reduction required by ventilation and air-conditioning systems. Aspects studied are: noise sources (fans, ducts, terminal box, etc.); system attenuation; weighting system; acoustic frequency analysis of installed systems (low-and high pressure installations, duct in room without an air outlet); calculations from other literature sources. Conclusions: the 250Hz octave band is a critical frequency for the required insertion losses; only slightly higher, or in most cases even smaller, attenuation values are required in frequency bands above and below 250Hz; with conventional absorption silencers, selection depends on the insertion loss at or near the 250Hz octave band. |
| Descriptors (primary) |
airflow noise; ventilation systems; silencers; fans |
| Descriptors (secondary) |
acoustics; sound spectrum analysis; mathematical analysis; sound attenuation |
| Document type |
- |
| Subject(s) |
Noise, hearing and vibration
|
| Broad subject area(s) |
|
| Browse category(ies) |
Compressed gases and pressure vessels
Noise
Ventilation
|
