Electro-acoustic system analyzer
US5555311A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1994 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Apr 1, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for analyzing performance parameters of an electro-acoustic system. The bandwidth of the electro-acoustic system is determined by applying a broad band stimulus signal to its input, and picking up the resulting acoustic signal with a microphone. The microphone output is then applied to a state variable filter having a low-pass filter output, a high-pass filter output, and a band-pass filter output. The operating frequency of the state variable filter is changed incrementally through each of a plurality of frequencies. The high and low frequency responses of the electro-acoustic system is determined on the basis of the operating frequencies of the state variable filter at which accumulated values of the outputs of the state variable filter bear certain relationships to each other. The thermal power limit of the electro-acoustic system is analyzed by applying a gradually increasing random noise signal to the input, and monitoring the amplitude of the resulting acoustic signal to determine when the acoustic signal no longer tracks the input signal. The equalizability of the electro-acoustic system is determined by comparing the phase of a swept input signal with…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.