By Rajiv Padhye, Rajkishore Nayak (eds.)
This booklet highlights the producing and functions of acoustic textiles in numerous industries. additionally it is examples from diversified industries during which acoustic textiles can be utilized to take in noise and support decrease the effect of noise on the office. Given the significance of noise aid within the operating atmosphere in numerous industries, the e-book bargains a worthwhile advisor for corporations, educators and researchers concerned with acoustic materials.
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Extra resources for Acoustic Textiles
Can be imparted in ceiling, walls and bottom of the floor. The efﬁcacy of the different sound absorbing materials can be evaluated using a grade scale. This is referred as sound classiﬁcation system. 9 Sound Classiﬁcation In sound classiﬁcation, as mentioned earlier, sound absorption by different sound insulation materials are represented by a common value, say, sound absorption coefﬁcient. Based on the coefﬁcient value, various sound absorption classes are developed. ISO 11654:1997 have standardized those classes as A–F where A is the best sound class with the highest sound absorption coefﬁcient and F is the lowest sound absorption coefﬁcient (Table 4).
2 Absorption There is usually an energy loss when sound propagates in a medium. Although the energy loss can be caused by some kinds of energy dissipation such as absorption, the term “attenuation coefﬁcient” is used in Sect. 1 to describe the reduction in amplitude of a progressive wave with the distance in the propagation direction in the medium. When the sound wave encounters different medium or space Principles of Sound Absorbers 47 discontinuity in the propagation, reflection happens. The energy loss associated with the reflection from a boundary is described by the sound pressure reflection coefﬁcient, which is the change in amplitude and phase of the propagating wave taken place during the reflection.
V. Kadam and R. Nayak References 1. Reverberation time (2009). Oxford University Press 2. Speed of sound (2016). Britannica Academic 3. Blauert J (2005) Analysis and synthesis of auditory scenes. In: Communication acoustics. Springer 4. Blauert J, Xiang N (2009) Acoustics for engineers: troy lectures. Springer Science & Business Media 5. Hollar S (2013) Sound. Britannica Educational Publishing, Chicago 6. Möser M (2009) Engineering acoustics: an introduction to noise control. Springer Science & Business Media 7.