Phone enquiries please call Australia: (02) 8005 5343 / International +61 2 8005 5343
Have you ever wondered how far away bats and other animals can be and still be detected by your microphone? This is a question we get very frequently.
The simple answer is that there isn't a simple answer.
Microphones do not have a "range" in that they will capture any sound that reaches the element inside.
Atmospheric attenuation, the frequency of the sound, the direction the animal was facing, and a large number of other conditions all affect how far away a sound can be heard.
For acoustic microphones this translates to "if you can hear it, so can the microphone."
An owl calling from 800 meters away may be heard in a quiet forest where a mouse squeak may not be heard from 10m. Also humans have a great ability to filter out wind noise automatically, so you may be able to pick out a sound that is masked in a recording. On the other hand, there are times when you can see a sound in a spectrogram that you could not easily discern when listening in person.
When recording ultrasonic sounds such as bat echolocations with a microphone, a good rule of thumb is that most bat species can be detected at a distance of 30m with a likely maximum of 100m for a very loud, low frequency bat pointing directly at you in perfect conditions.
In the spirit of reconciliation, Faunatech acknowledges the Traditional Custodians of Country throughout Australia and their connections to land, sea and community. We pay our respect to Elders past and present and extend that respect to all Aboriginal and Torres Strait Islander peoples today.
6/269 Victoria Road
Rydalmere NSW 2116
Australia: (02) 8005 5343
International: +61 2 8005 5343