2188515-A is referenced by 4 patents and cites 3 patents.

A method of broadcasting and apparatus therefor find particular application in relaying and broadcasting sound effects, including the voices of referees and players, which occur on-field during sports events. The method comprises the steps of providing one or more primary broadcasters, such as players, referees or officials involved in the event, with a primary broadcast radio transmitter 10 and a microphone 16 connected thereto to broadcast, on a primary broadcasting frequency 12, such audible signals as are generated within the area of sensitivity of the microphone 16.; The primary broadcasts are received by one or more primary receiving stations 14 and the signals from the receiving stations are mixed and controlled in a secondary broadcasting station 18,24 from where a controlled signal is broadcast on a secondary broadcasting frequency 26, different from the primary broadcasting frequencies 12, to a number of receivers 28,30 located in the vicinity, or carried on the persons of, a predetermined number of spectators of the event.

Title
Broadcasting method and apparatus
Application Number
GB19870006597 19870319
Publication Number
2188515 (A)
Application Date
March 19, 1987
Publication Date
September 30, 1987
Inventor
Neethling Christiaan Troskie
Assignee
Audiosport Int
IPC
H04B 07/00
H04H 01/00
H04H 01/00
H04B 05/00
A63B 71/00
H04H 20/61
H04B 05/06
A63B 71/00
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