INSTRUMENT AMPLIFICATION SYSTEMS INCORPORATING REFLECTION CANCELLING BOUNDARY MICROPHONES AND MULTIBAND COMPRESSION

摘要

Instrument amplification systems incorporating reflection cancelling boundary microphones and multiband compression in accordance with embodiments of the invention are disclosed. In one embodiment, an amplification system includes a microphone configured to generate an audio signal based upon acoustic waves within the instrument including audio content within a low frequency band including a fundamental resonant frequency of the instrument, a middle frequency band including at least one harmonic frequency of the instrument, and an upper frequency band, where the frequency response characteristics of acoustic waves generated within the instrument in the low frequency band differ from the characteristics of acoustic waves generated outside of the instrument, and an electronic preamplifier system configured to provide the audio content within the low frequency band to a low frequency band amplification circuit that applies compression to provide audio content having frequency characteristics corresponding to the characteristics of acoustic waves generated outside of the instrument.

主权项

1. An instrument amplification system, comprising:
a microphone mounted to a stringed acoustic musical instrument and configured to generate an audio signal based upon acoustic waves within the interior of the stringed acoustic musical instrument, wherein the audio signal comprises audio content within a plurality of frequency bands including at least:
a low frequency band that includes a fundamental resonant frequency of the stringed acoustic musical instrument;a middle frequency band that includes frequencies higher than the frequencies of the low frequency band and includes at least one harmonic frequency of the stringed acoustic musical instrument; andan upper frequency band that includes frequencies higher than the frequencies of the middle frequency band;wherein the frequency response characteristics of acoustic waves generated within the stringed acoustic musical instrument in at least the low frequency band differ from the frequency response characteristics of acoustic waves generated outside of the stringed acoustic musical instrument in the same frequency band due to reverberation of acoustic waves within the low frequency band within the stringed acoustic musical instrument; and an electronic preamplifier system configured to:
receive the audio signal;provide portions of the audio signal to a plurality of amplification circuits, where audio content within one of the plurality of frequency bands in the audio signal is provided to each amplification circuit; andcombine the outputs of the amplification circuits into an output signal;wherein the audio content within the low frequency band is provided to a low frequency band amplification circuit from the plurality of amplification circuits that applies frequency specific compression to the given frequency band to provide audio content in the low frequency band having frequency characteristics corresponding to the frequency response characteristics of acoustic waves generated outside of the stringed musical instrument in the low frequency band.