Sound signal generator testing apparatus

Details Sound signal generator testing apparatus Sound signal generator testing apparatus

2007-01-05

2011-11-08

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

C381S094100, C702S104000

Reexamination Certificate

active

08054982

ABSTRACT:
A sound signal generator testing apparatus is provided. The apparatus includes a hermetic seal (2), a sound signal input unit (4), and at least a noise suppression unit (5). The sound signal input unit is for receiving sound signals transmitted from a sound signal generator (1) under testing. Each noise suppression unit includes a sound signal input unit, a low pass filter, an inverter, and an output. The sound signal input unit is for receiving sound signals. The low pass filter is for filtering the sound signals by passing the low frequencies of the sound signals that are below a predetermined value. The inverter is for inverting phases of the sound signals transmitted from the low pass filter and producing inverted sound signals. The output unit is placed behind the sound signal input unit for outputting the inverted sound signals.

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Inventors: Gong-Huan Du, Zhe-min Zhu, Xiu-Fen Gong; Title of the Article: Fundamentals of Acoustics; Date of the issue of the Article: Mar. 2001; ISBN of the Article: 7-305-03631-5; p. 462; publisher: nan jing university publishing company; City wherein published: nan jin, Translation.

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