faux tographer
Sound - Bat detector
Circuit board and speaker from a Franzis bat detector. The unit picks up ultrasonic sounds from bats and plays them at a
frequency audible to humans. It also detects other things such as species of grasshoppers that chirp at a frequency humans cannot normally hear.
It comes as a kit of parts which you solder together yourself. All part of the fun.
The care with which Lenswrangler has defined sound, and the fact bats and some grasshoppers are inaudible to humans raises the old philosophical argument
" If a tree falls in the forest and no one is around to hear it ,does it make a sound.?"
One argument is NO it only makes airwaves. It does not become sound until a brain interprets the airwaves as 'Sound'.
But do we exclude all other animals that might have 'heard' the tree the same way as we do. Or creatures that might detect its fall as vibrations through their body?
Is it still sound if bats can hear it but not humans?
Sound - Bat detector
Circuit board and speaker from a Franzis bat detector. The unit picks up ultrasonic sounds from bats and plays them at a
frequency audible to humans. It also detects other things such as species of grasshoppers that chirp at a frequency humans cannot normally hear.
It comes as a kit of parts which you solder together yourself. All part of the fun.
The care with which Lenswrangler has defined sound, and the fact bats and some grasshoppers are inaudible to humans raises the old philosophical argument
" If a tree falls in the forest and no one is around to hear it ,does it make a sound.?"
One argument is NO it only makes airwaves. It does not become sound until a brain interprets the airwaves as 'Sound'.
But do we exclude all other animals that might have 'heard' the tree the same way as we do. Or creatures that might detect its fall as vibrations through their body?
Is it still sound if bats can hear it but not humans?