Characteristics of Sound Absorption in Lotus-Type Porous Magnesium

作者： Zhen Kai Xie , Teruyuki Ikeda , Yoshiyuki Okuda , Hideo Nakajima

关键词: Audio frequency 、 Composite material 、 Materials science 、 Noise reduction coefficient 、 Mineralogy 、 Porosity 、 Dissolution 、 Attenuation coefficient 、 Range (particle radiation) 、 Hydrogen 、 Magnesium 、 General Engineering 、 General Physics and Astronomy

摘要: Lotus-type porous magnesium with many unidirectional cylindrical pores was fabricated by solidification of a melt dissolving hydrogen in pressurized atmosphere. The sound absorption coefficient whose specimen face has open measured the standing-wave method frequency range up to 4 kHz. increases decreasing pore size, while it porosity. Moreover, peak value high is shifted toward higher when thickness decreases. It suggested that lotus-type exhibits excellent characteristics.