Communicating or reproducing an audible sound

Details Communicating or reproducing an audible sound Communicating or reproducing an audible sound

2011-08-16

2011-08-16

Sedighian, M. R. (Department: 2613)

Optical communications

Transmitter and receiver system

Including optical waveguide

C398S016000, C398S140000

Reexamination Certificate

active

08000609

ABSTRACT:
The present invention relates to the communication or reproduction of sound, in particular audible sound. There is provided a method of communicating a sound, including the steps of: transmitting, onto an optical link, pairs of signal copies, the signal copies of a given pair having a time offset relative to one another; applying the audible sound to the optical link, such that the audible sound causes a phase modulation to the transmitted signal copies; receiving modulated signal copies previously transmitted onto the link; and, for received pairs of signal copies, causing one signal copy of a pair to mix with the other signal copy of that pair so as to produce a signal representative of the sound. The sound is an audible sound. It has been found that a delay of at least 75 micro seconds allows for a better reproduction of audio sounds, since these have a relatively low frequency content.

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