dxpwny
Advanced Member level 4
How to detect high frequency sound ?
I need some advice on how I might accomplish the detection of very high frequency sound. I do not know the source of the sound, or where is comes from (sorry - I don't care and can't answer any questions about that). I also do not know the exact frequency - or range. I know it is higher then what I can hear, so perhaps 20 - 50 khz <?>.
I'd be happy just detecting that a sound above a certain the frequency threshold was present - not necessarily the amplitude, and log the event to a text file with a time stamp.
As part of the project I'm already using an 8051, tied to my PCs serial port, to detect something else. So, a simple logic high when the sound is detected is fine.
I'd have ideas if the sound were 10khz, but it isn't and I don't know what device is best to detect such high frequency.
Thanks for helping.
I need some advice on how I might accomplish the detection of very high frequency sound. I do not know the source of the sound, or where is comes from (sorry - I don't care and can't answer any questions about that). I also do not know the exact frequency - or range. I know it is higher then what I can hear, so perhaps 20 - 50 khz <?>.
I'd be happy just detecting that a sound above a certain the frequency threshold was present - not necessarily the amplitude, and log the event to a text file with a time stamp.
As part of the project I'm already using an 8051, tied to my PCs serial port, to detect something else. So, a simple logic high when the sound is detected is fine.
I'd have ideas if the sound were 10khz, but it isn't and I don't know what device is best to detect such high frequency.
Thanks for helping.