Invention Application
- Patent Title: Parametric array modulation and processing method
- Patent Title (中): 参数阵列调制和处理方法
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Application No.: US10525539Application Date: 2003-08-26
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Publication No.: US20050207587A1Publication Date: 2005-09-22
- Inventor: Frank Pompei
- Applicant: Frank Pompei
- Priority: US60406230 20020826
- International Application: PCT/US03/26998 WO 20030826
- Main IPC: G10K15/02
- IPC: G10K15/02 ; H03D9/00 ; H04B1/02 ; H04B3/00 ; H04B11/00
Abstract:
A system using the nonlinearity of a propagation medium to demodulate an ultrasonic wave having audio modulated onto the ultrasonic frequency, audio signal processing circuitry providing a delayed audio signal and an envelope signal which is a function of peaks of the audio signal over a predetermined interval. The delayed audio signal and the envelope signals are combined with the delay in the audio allowing the envelope signal to accurately be aligned with the audio signal in the combination.
Public/Granted literature
- US07596228B2 Parametric array modulation and processing method Public/Granted day:2009-09-29
Information query
