Papers
Release Time: 2025-04-30Hits:
- Date:2025-04-30
- Title of Paper:Investigation on low-frequency broadband characteristics of three-dimensional acoustic black hole superstructures
- Journal:International Journal of Modern Physics B
- Summary:In order to solve the problem of strong penetration and difficult attenuation of lowfrequency sound wave in traditional materials, several three-dimensional acoustic black
hole superstructures are designed. First of all, multi-stage acoustic black holes are designed. It is found that their sound insulation coefficient is about 0.9 in the frequency
range of 50{1600 Hz when the ration of the outlet tip diameter to the inlet diameter
is d=D = 12=99 = 0:121. Then, the acoustic black hole thin and light superstructure
was designed by embedding many acoustic black hole units in an array on the 10 mm
thick plate. The sound insulation coefficient of two samples embedded 81 or 144 acoustic
black holes is above 0.96 in the frequency range of 50{1600 Hz. To facilitate processing
and engineering applications, we designed acoustic black hole wedge-shaped plate superstructures, and found that the average sound insulation of these acoustic black hole
superstructures is 30 dB in the frequency range of 50{1600 Hz. These superstructures
will be widely used in anechoic rooms, factories and aviation. - Co-author:Zhuo Zhou, Xiao Liang, Jiu Hui Wu, Peng Shang and Jiamin Niu
- Volume:Vol.34, No.17, 2020
- Page Number:2050151 (9 pages)
- Translation or Not:No
- Date of Publication:2020-04-22
