AUDIO-SIGNAL GENERATOR Russian patent published in 1995 - IPC

FIELD: technical acoustics. SUBSTANCE: audio-signal generator has pre-combustion chamber which is connected with compressed air source. The prechamber is connected with horn through valve unit which is formed by two cylindrical envelopes put one onto the other; the envelopes are connected together through resilient members. One envelope is perforated and motionless, the other one is perforated partially and movable. Smooth part of movable envelope has to be short-circuited turn which is disposed inside annular space of magnetic circuit coaxially to motionless excitation coil. The latter is wound by a conductor which is made of two sections at least of capillary pipe. The sections are connected in series electrically with internal cavity through current-conducting conductors and in parallel hydraulically through the cavities of the same conductors. In this case, end conductors have to be electric terminals. Any section of capillary pipe has one end connected with head cavity of one adaptor; the other its end is connected with drainage cavity of the other adaptor. Cavities of the adaptors are connected with head and drainage channels correspondingly. The channels are connected with non-conducting liquid source under pressure. EFFECT: improved efficiency. 2 dwg