Loudspeaker system reproducing bass to treble frequencies - has membranes acceleration measured to provide feedback for loudspeaker and power amplifier

摘要

The loudspeaker system has a broadband membrane loudspeaker or electroacoustic transducer. The membrane is accelerated by a range of low frequencies covering the membrane's entire range of mechanical resonant frequencies. The loudspeaker is connected to a power amplifier. The loudspeaker's feedback path contains a device for measuring average acceleration over the entire surface of the membrane. The measuring device and a control-current measuring device are connected to a low pass filter and to a high pass filter. The amplifier's feedback signal is formed by adding the acceleration and current information.