Hello everyone,
I am working on a project where I need to detect the sound of vehicles (cars, heavy trucks) from a distance of around 100 m. The microphone will be placed in an open area on land, and the goal is to identify when a vehicle is approaching.
Currently, I am evaluating microphones like AOM-5024L-HD-R and CMA-4544PF-W, connected to a MAX9814 preamplifier module, with the output fed into an Arduino Uno ADC.
My questions are:
- What type of microphone is most suitable for long-distance vehicle detection (100 m)?
- How can I calculate whether the microphone output voltage will be sufficient for reliable detection at that distance?
- Should I use additional filters (e.g., low-pass or band-pass) to separate vehicle sound from background noise (wind, people, etc.)?
- Would I need a higher-gain preamplifier or a different approach (like a geophone or array microphone) for better detection?
Any advice, references, or design suggestions will be very helpful.
