Method of Determining the Sound Absorbing Coefficient of Materials within the Frequency Range of 5 000–50 000 Hz in a Test Chamber of a Volume of about 2 m3

• Autorzy: Mikulski W.
• Języki publikacji: EN

Abstrakty

EN

Sound absorption coefficient is a commonly used parameter to characterize the acoustic properties of sound absorbing materials. It is defined within the frequency range of 100-5 000 Hz. In the industrial conditions, many appliances radiating acoustic energy of the frequency range of above 5000 Hz are used and at the same time it is known that a noise within the frequency range of 5 000-50 000 Hz can have a harmful effect on people,hence there is a need to define the coefficient in this frequency range. The article presents a proposal for a method of measurement of the sound absorption coefficient of materials in the frequency range from 5 000 Hz to 50 000 Hz. This method is a modification of the reverberation method with the use of interrupted noise.

Słowa kluczowe

EN

ultrasonic noise; sound absorption coefficient of materials

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2013
• Tom: Vol. 38, No. 2
• Strony: 177--183
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Mikulski W.

• Central Institute for Labour Protection – National Research Institute Czerniakowska 16, 00-701 Warszawa, Poland

Bibliografia

• 1. Blough J.R, Rao M.D., Londhe N. (2007), Application of the ISO 13472-1 in situ technique for measuring the acoustic absorption coefficient of grass and artificialturf surfaces, Elsevier, Townsend 2007.
• 2. Dobrucki A., Zółtogórski B., Pruchnicki P., Bolejko R. (2010), Sound-Absorbing and Insulating Enclosures for Ultrasonic Range, Archives of Acoustics, 35, 2, 157-164.
• 3. Pleban D. (1990), The study acoustic properties of materials in the frequency range of 4-20 kHz [in Polish: Badanie właściwosci dźwiękochłonnych materiałów w zakresie częstotliwości 4-20 kHz], Proceedings of the 37 Open Seminar on Acoustics OSA’90, Gdansk, Poland.
• 4. Mikulski W., Radosz J. (2009), The loud speaker sound source emitting acoustic energy in frequency band from 8 kHz to 50 kHz, Proceedings of the Conference INTER-NOISE 2009, 23-26.08.2009, Ottawa, Canada.
• 5. Mikulski W., Radosz J. (2010), The measurements of ultrasonic noise sources in the frequency range from10 kHz to 40 kHz, Proceedings of the 17th International Congress on Sound and Vibration, Cairo, 18-22 July 2010.
• 6. EN ISO 354:2003 Acoustics - Measurement of sound absorption in a reverberation room [in Polish: PN EN ISO 354:2005, Akustyka. Pomiary pochłaniania dźwięku w komorze pogłosowej ].
• 7. ISO 9613-1:1993 Acoustics - Attenuation of sound Turing propagation outdoors - Part 1: Calculation of the absorption of sound by the atmosphere [in Polish; PN ISO 9613-1:2000, Akustyka - Tłumienie dźwięku podczas propagacji w przestrzeni otwartej - Obliczanie pochłaniania dźwięku przez atmosferę].