| Document ID (ISN) | 20998 |
| CIS number |
74-997 |
| ISSN - Serial title |
0509-6510 - Prace Centralnego instytutu ochrony pracy |
| Year |
1973 |
| Convention or series no. |
|
| Author(s) |
Trynkowska D. |
| Title |
Methods for measuring the sound absorption efficiency of ear plugs |
| Original title |
Metoda pomiaru skuteczności tłumienia dźwięków przez ochronniki słuchu typu wkładek [in Polish] |
| Bibliographic information |
1973, Vol.23, No.78, p.245-259. 14 ref. |
| Abstract |
The efficacy of 3 models of ear plugs of Polish, Swedish and East German design was checked by the psychoacoustic method of absolute hearing threshold shift, by the audiometric method and by the objective method of the "real ear". A statistical analysis of the test results shows that the best method for evaluating the sound attenuation afforded by these hearing protectors is the psychoacoustic method applied in the free acoustic field, which is very similar to the actual acoustic field at a workpost located near a noise source. This method also allows comparisons between various types of ear protectors (for example earmuffs and ear plugs). The 2nd experimental method, which gave much higher values than the actual attenuation values, is not recommended, whereas that of the "real ear", using white noise filtered into octave bands, is only useful for studying the sound damping efficacy of earmuffs. |
| Descriptors (primary) |
noise; earplugs; evaluation of control measures; sound attenuation |
| Descriptors (secondary) |
comparative study; audiology |
| Document type |
- |
| Subject(s) |
Noise, hearing and vibration
|
| Broad subject area(s) |
|
| Browse category(ies) |
Accident research
Noise
Hearing protection
|
