On the application of shunted piezoceramics for increasing acoustic transmission loss in structures

Citation
M. Ahmadian et Km. Jeric, On the application of shunted piezoceramics for increasing acoustic transmission loss in structures, J SOUND VIB, 243(2), 2001, pp. 347-359
Citations number
16
Categorie Soggetti
Mechanical Engineering
Journal title
JOURNAL OF SOUND AND VIBRATION
ISSN journal
0022460X → ACNP
Volume
243
Issue
2
Year of publication
2001
Pages
347 - 359
Database
ISI
SICI code
0022-460X(20010531)243:2<347:OTAOSP>2.0.ZU;2-N
Abstract
The application of electrically shunted piezoceramic materials (PZTs) for i ncreasing transmission loss is studied. A test setup in an SAE J1400 facili ty is used to analyze the sound transmission loss due to a test plate with shunted PZTs, and to compare the results with an undamped plate and a plate with constrained-layer damping materials. The test results indicate that s hunted PZTs can increase sound transmission loss by approximately 6 dB for a pure tone input at 162 Hz, and 7 dB for a broad band input of 10-10000 Hz . The test results further show that, compared to the constrained layer dam ping materials that are commonly used in the automotive industry, PZTs prov ide a substantially higher sound transmission loss-to-weight ratio. This pa per will present the test setup in an SAE J1400 facility, the installation of the PZTs on a test plate, and the tuning procedure that is used for the shunt circuits. It also provides a detailed analysis of the results of soun d transmission tests for three different test plates, namely an undamped pl ate, a plate with constrained layer damping, and a plate with electrically shunted PZTs. (C) 2001 Academic Press.