Receiving system having pre-selected directional response
Номер патента: CA1158173A
Опубликовано: 06-12-1983
Автор(ы): William R. Wray
Принадлежит: Polaroid Corp
Опубликовано: 06-12-1983
Автор(ы): William R. Wray
Принадлежит: Polaroid Corp
Реферат: ABSTRACT OF THE DISCLOSURE A sound receiving system has an array of microphone elements for producing output signals in response to incident sound, and signal processing means for processing the output signals to provide the array with pre-selected directional acceptance and rejection characteristics. Such processing includes integrating the difference between the output signals of a pair of elements to produce an integrated signal summing the outputs of the same or different pair of elements to obtain a sum signal, and combining the integrated signal with the sum signal. The spatial position of pairs of elements and their orientation permit closely spaced pairs of elements to exhibit a single highly directional characteristic, or two angularly related highly directional characteristics. Thus, an array of microphone elements clustered at essentially a point location can exhibit either monaural or stereophonic characteristics, depending upon the type of signal processing applied to their outputs. To minimize wind noise pickup, low frequency components of the integrated signal are suppressed to produce a filtered integrated signal, and high frequency components in the output signal of at least one of the elements are suppressed for producing a filtered output signal. The two filtered signals are added together to produce a resultant signal wherein only the higher frequency information signals will be direc-tionally picked up and amplified. For stereophonic use to which the inven-tion is particularly directed the microphone array is triangular with an apex microphone and at least one other microphone defining a first channel and the apex microphone and at least one further microphone defining a second channel.
Microphone receiver and microphone receiver system
Номер патента: US20180213325A1. Автор: Douglas P. Bryant,Sean M. Meagher. Владелец: SAMSON TECHNOLOGIES CORP. Дата публикации: 2018-07-26.