Enhanced concert audio process utilizing a synchronized headgear

Details Enhanced concert audio process utilizing a synchronized headgear Enhanced concert audio process utilizing a synchronized headgear

1997-04-07

1998-10-13

Chang, Vivian

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 79, H04R 2700

Patent

active

058224408

ABSTRACT:
An audio enhancement system and method is provided wherein a wireless headphone system comprises a transmitter and a receiver. The transmitter for this system broadcasts a Direct Sequence Spread Spectrum (DSSS) CDMA signal on a number of separate code channels in the 902-928 MHz ISM band. Each successive code channel will have its audio signal delayed by a preset period, e.g. 30 mS, relative to the previous channel. A reference signal on one or more separate time synchronized code channels will be simultaneously transmitted from multiple dedicated transmitters within the venue. Analysis of these multiple code channels by the electronics in the headset will provide the headset with an approximate radial distance from the stage. The headset receiver, supporting position location signals, and associated hardware will select the appropriate audio code depending on the listener's distance from the main loudspeakers. These code channels are laid out such that when in a large venue, and if the proper channel is chosen, the sound received electronically over the wireless channel will be slightly behind the phase of the sound arriving to the listener from the main loudspeakers. The headgear associated with this system also enhances the quality of the music delivered to the transient listener.

REFERENCES:
patent: 3970787 (1976-07-01), Searle
patent: 4589128 (1986-05-01), Pfleiderer
patent: 4593404 (1986-06-01), Bolin
patent: 5425106 (1995-06-01), Katz et al.
patent: 5432858 (1995-07-01), Clair, Jr. et al.

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