The Sound source width control has been used to control the width of the sound source in a stereophonic audio system that can varied continuously. Part of the signal voltage of the one channel is added to the second channel. One 10K LIN Ganged potentiometer are used to control the sound source width continuously between in-phase crosstalk of about 100% (corresponding to mono operation) and anti-phase crosstalk of 23%.
This is a battery operated Wireless FM Transmitter that can transmit the audio signal up to a range of 100 feet of any spot frequency within the FM band. The transmitter could be assembled on a small Printed Circuit Board approximately at size of 35mm X 45mm. The field strength of the radiated signal will not exceed 50μV / meter at a distance of 15 meters from the unit.