I have a lot experience with ultrasound for machinery monitoring. Can hear grease going into a bearing,
I can bear a tiny little relay in a multi ton transformer cabinet, it is on a card, on a motherboard, in a 1/8" thick seal cabinet with my gear.
I can hear your eyes open, your fingers running together, etc feom feet away. No real matter the noise levels from the thousands of horsepower of pumps running.
Can't pick up a voice.
Electronics can be noisy around 40 kHz.
A shovel moving gravel is noisy.
Keys rattle terribly.
When doing inspections outside, a bird walking by make a lot of noise
So yeah, cat's and dogs live in an entirely different noise level.
BluesFan43 t1_itl7sys wrote
Reply to Are urban environments "noisy" at ultrasound frequency ranges? If they are, does this cause problems for animals that can hear in these frequencies? by derefr
I have a lot experience with ultrasound for machinery monitoring. Can hear grease going into a bearing,
I can bear a tiny little relay in a multi ton transformer cabinet, it is on a card, on a motherboard, in a 1/8" thick seal cabinet with my gear.
I can hear your eyes open, your fingers running together, etc feom feet away. No real matter the noise levels from the thousands of horsepower of pumps running.
Can't pick up a voice.
Electronics can be noisy around 40 kHz.
A shovel moving gravel is noisy.
Keys rattle terribly.
When doing inspections outside, a bird walking by make a lot of noise
So yeah, cat's and dogs live in an entirely different noise level.