Sorry for replying lately
I want to record footsteps or more accurately people on the stairs of my apartment.An audio detection software (like
Sound Detection and microphone monitoring software - Zone Trigger) will email me recordings whenever it detects someone so that i will know if someone is waiting for me inside the building.It may sound paranoid but there were some incidents around here lately.
I bought a cheap USB microphone and increased its volume from microphone control as you suggested and made some recording with audacity software
audacity software (to open the recording):
Audacity: Free Audio Editor and Recorder
recording:
2shared - download 1.aup
Recording is amplified with 35db gain.I cant use audacity for my purpose because it doesnt amplify sound realtime.
My flat is on the second floor.In the recording i descended to the ground floor (at about 38th second) and then began climbing.
I want to be able to hear footsteps two floors up and down.Is there any cheap and simple solution for a much more louder and clearer recording?
specifications of the microphone i used for recording:
omni-direction
output impedance:1.4k+-30%
frequency response:50~16khz
sensitivity:-58db+-2db
operating voltage:1v~10v
current consuption:0.8ma max
s/n ratio 40db or more