| Main Title |
Comparison of Sound Power Determinations Conducted in Four Different Acoustic Environments. |
| Author |
Mansbach, Peter A. ;
|
| CORP Author |
National Bureau of Standards, Washington, DC. ;Environmental Protection Agency, Washington, DC. Office of Noise Abatement and Control. |
| Year Published |
1978 |
| Stock Number |
PB-288 033 |
| Additional Subjects |
Acoustic measurement ;
Power measurement ;
Noise levels
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-288 033 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
The sound power levels emitted by five vacuum cleaners and one reference sound source were determined in four different acoustic environments in accordance with appropriate domestic and international measurement standards, and also using only four measurement locations, to ascertain any differences between the various procedures. The study shows general agreement among the results, (rms differences between A-weighted sound power levels of 1.0 to 1.5 dB). Determinations conducted in the reverberation room appear systematically low by about 0.8 dB (A-weighted sound power level); determinations made using four microphones may be biased if the microphones are located too close to the source. Use of the comparison (reference sound source) method eliminated systematic bias and improved the agreement between environments (rms differences of 0.5 to 1.0 dB). |
| Supplementary Notes |
Sponsored in part by Environmental Protection Agency, Washington, DC. Office of Noise Abatement and Control. |
| Availability Notes |
Pub. in Proceedings of Inter-Noise 78 Conference, San Francisco, California May 8-10, 1978 p269-276 May 78. (Inst. of Noise Control Engineering, Poughkeepsie, NY.). |
| NTIS Title Notes |
Final rept.. |
| PUB Date Free Form |
May 78 |
| Category Codes |
20A; 14B; 68B; 46A; 86V |
| NTIS Prices |
Not available NTIS |
| Primary Description |
200/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
323751702 |
| Origin |
NTIS |
| Type |
CAT |
