Patent · US Expired

Method and device for determining acoustical transfer impedance

US7616767B2 · kind B2 · utility

4Cited by

2References

14Claims

0Family size

Assignee

Bruel & Kjaer Sound & Measurement A/S · DK

Inventors

Klaus Geiger · Selb, DE
Christian Glandier · Eßlingen, DE
Rolf Helber · Schorndorf, DE

Key dates

Filing date	Apr 14, 2004
Grant date	Nov 10, 2009
Priority date	—
Expiry date	Dec 2, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH04R5/027
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The method comprises generating an acoustical volume velocity Q in the listening position, measuring a response quantity p, such as sound or vibration, at a suspected source position resulting from the volume velocity Q, and determining the acoustical transfer impedance Zt as the response quantity p divided by the acoustical volume velocity Q, Zt=p/Q. According to the invention the acoustical volume velocity Q is generated using a simulator (10) simulating acoustic properties of at least a head of a human being, the simulator comprising a simulated human ear (14, 15) with an orifice in the simulated head and a sound source (30) for outputting the acoustical volume velocity Q through the orifice. The output volume velocity Q from the orifice of an ear is estimated from measurements with two microphones inside the corresponding ear canal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.