Electrical audio signal processing systems and devices – Sound effects
Patent
1993-05-21
1995-08-22
Kuntz, Curtis
Electrical audio signal processing systems and devices
Sound effects
381 63, 84707, 84630, 84DIG26, H03G 300
Patent
active
054447844
ABSTRACT:
A sound echo machine as an acoustic signal processing unit of the present invention comprising an adder to which an input signal is fed, and a delay circuit for delaying the signal fed from the adder for a certain time to repeatedly feed back to the adder to generate an echo sound further comprises an input signal level detector for detecting the level of the input signal and sending it to a frequency oscillator to vary the oscillating frequency in accordance with the thus detected signal level for feeding it later to the delay circuit so as to modulate the time to be delayed at a predetermined cycle, whereby it can create an acoustic field in which a listener can feel as if various level of reflected sounds are coming towards him from various directions. On the other hand, a sound effecter as an acoustic signal processing unit comprising a plurality of acoustic signal processing sections, a plurality of attenuators each connected to these acoustic signal processing sections, and an adder for summing up all the signals from these attenuators further comprises a signal mixing ratio control section for monitoring the input acoustic signal level, and determining a signal mixing ratio among the respective output signals from the plurality of acoustic signal processing sections in accordance with the thus monitored level of the input acoustic signal, whereby even a simple structure can provide a specific sound effect.
REFERENCES:
patent: 4005268 (1977-01-01), Canell et al.
Kuntz Curtis
Pioneer Electronic Corporation
Tran Sinh
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