Содержание
- 2. Vocabulary Determination – определение; sound-absorbing – звукопоглощение; flexible – гибкий; fluctuations – колебания; density – плотность;
- 3. SUBJECT: Types and properties of sound-absorbing panels Work purpose: To investigate tools for measurement of acoustic
- 4. Plan: 1) who and why used sound-absorbing panels 2) characteristics of sound-absorbing panels 3) types of
- 5. 1) The acoustic panels used to improvement of a sound absorption in rooms are demanded in
- 6. characteristic of some levels of volume of sound
- 7. Sound-absorbing materials are divided by nature of sound absorption on: panel materials and designs in which
- 8. sound-absorbing materials have sound absorption coefficient at least 0,4 with a frequency of 1000 Hz
- 9. Noise level also depends on reverberation time (time of sounding of the reflected signal).
- 10. speed of sound distribution in this panels is much less, than in dense materials with the
- 11. Sound-absorbing materials are divided by structural indicators and size of relative compression
- 12. types of the measuring tools helping to measure these characteristics
- 13. wide range of types
- 14. comparative researches defined the winner - it is asbestos-cement acoustic baffles.
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