Hello everyone,
I have invented a lighting system that flashes in time to the beat of nearby music sources.
On a breadboard I have created the following:
A circuit comrpising of an ominidirectional microphone--- pre amp--- automatic gain system (keeps output of pre amp constant). This signal is then filtered through low pass filter (160hz cut off). The peak of this signal then captured with envelope detector, which activates a comparator- which flashes an LED.
The end effect is a light that flashes in time with beat of music.
I keep it on my desk nearby my loudspeakers- it works great.
However, a problem I have, is when I walk nearby, it flashes with each thud of my footstep.
The system is designed to flash upon detection of sounds above 104 dB.
I am thinking perhaps I have two options:
1. Presuming footsteps are very low sound- I could replace low pass filter with bandpass filter- and stop detecting very low sounding frequency footsteps.
2. Increase the sound threshold of system, so that low volume footsteps, perhaps arent picked up, yet loud music is. To me though, the footsteps don't sound loud, but picked up even when I walk at the other end of my room
Does anyone here have ideas/experience in reducing effects of floor vibrations in sound systems?
Thanks in advance,
Jonathan, from Scotland.
I have invented a lighting system that flashes in time to the beat of nearby music sources.
On a breadboard I have created the following:
A circuit comrpising of an ominidirectional microphone--- pre amp--- automatic gain system (keeps output of pre amp constant). This signal is then filtered through low pass filter (160hz cut off). The peak of this signal then captured with envelope detector, which activates a comparator- which flashes an LED.
The end effect is a light that flashes in time with beat of music.
I keep it on my desk nearby my loudspeakers- it works great.
However, a problem I have, is when I walk nearby, it flashes with each thud of my footstep.
The system is designed to flash upon detection of sounds above 104 dB.
I am thinking perhaps I have two options:
1. Presuming footsteps are very low sound- I could replace low pass filter with bandpass filter- and stop detecting very low sounding frequency footsteps.
2. Increase the sound threshold of system, so that low volume footsteps, perhaps arent picked up, yet loud music is. To me though, the footsteps don't sound loud, but picked up even when I walk at the other end of my room
Does anyone here have ideas/experience in reducing effects of floor vibrations in sound systems?
Thanks in advance,
Jonathan, from Scotland.