- Tytuł:
- Sound-Absorbing and Insulating Enclosures for Ultrasonic Range
- Autorzy:
-
Dobrucki, A.
Żółtogórski, B.
Pruchnicki, P.
Bolejko, R. - Powiązania:
- https://bibliotekanauki.pl/articles/178036.pdf
- Data publikacji:
- 2010
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
ultrasonic noise
sound absorbing and insulating enclosure
welder - Opis:
- The physical phenomena occurring in sound-absorbing and insulating enclosures are subject of the present paper. These phenomena are: absorption in air and by the sound-absorbing material covering the walls and the coincidence effect. The absorption in the air can be neglected in small size enclosures for low ultrasonic frequencies (20–30 kHz). The coincidence plays a role in decrease of the sound insulation, however the main role play the leaks. The boards made of ceramic fibers have been chosen as the optimal sound-absorbing material. They are dense and have deeply porous structures. The enclosure for insulation of 20-kHz noise produced by a welding machine has been designed and manufactured, and reductions of 25 dB of peak and Leq levels have been achieved.
- Źródło:
-
Archives of Acoustics; 2010, 35, 2; 157-164
0137-5075 - Pojawia się w:
- Archives of Acoustics
- Dostawca treści:
- Biblioteka Nauki
Artykuł