The Effect of Geometrical and Material Modification of Sound Diffusers on Their Acoustic Parameters

• Autorzy: Pilch A. , Kamisiński T.
• Języki publikacji: EN

Abstrakty

EN

Sound diffusers, in particular those based on changes in the phase of the reflected wave (Schroeder diffusers), have recently gained greatly in popularity in acoustics as an effective means to eliminate defects and improve the acoustic performance of interiors. This paper draws attention to a possibility of shaping acoustic parameters of sound diffusers and fundamental errors made in applying diffusers. Also, an often neglected issue of sound absorption by diffusers has been tackled. The presented results of laboratory measurements indicate a great significance of the diffusers' rigidity and geometry on their absorption coefficient at low frequencies. The effect of arrangement of elements on the diffusion coefficient was analysed for two types of elements based on the prime number N = 7.

Słowa kluczowe

EN

Schroeder diffusers; scattering; diffusion; absorption

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2011
• Tom: Vol. 36, No. 4
• Strony: 955--966
• Opis fizyczny: Bibliogr. 14 poz., wykr.

Twórcy

autor

Pilch A.

autor

Kamisiński T.

• AGH University of Science and Technology Department of Mechanics and Vibroacoustics Al. Mickiewicza 30, 30-059 Kraków, Poland,

Bibliografia

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