Device and method for testing impedance characteristic and expansion performance of sound absorption material
US10197438B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2015 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Jun 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are a device and a method for testing impedance characteristic and expansion performance of a sound absorption material. The device includes a first cavity and a second cavity which are both sealed. The first cavity is communicated with the second cavity through a slit channel. The second cavity is used for placing a sound absorption material therein. The device further includes a sound excitation source whose sounding face is located in the first cavity and used to provide a testing sound pressure. The device further includes two sound pickup sensors whose sound pickup surfaces are respectively arranged in the first cavity and the second cavity and respectively used to detect sound pressure in the first cavity and the second cavity. The device further includes a material for enclosing the first cavity and the second cavity is a hard sound insulation material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.