Recently read an article about focused sonar for precise measurement underwater. The thing that has me wondering, has anyone ever considered using a sonic system above ground for scanning measurements?
If so, how accurate is it? Are there any major drawbacks to using sound as opposed to light?
I think it has something to do with how water is incompressible and transmits sound waves very efficiently. Certainly not an expert in it though 😉
Also, air density varies so much because of humidity & pressure that the ability to accurately predict distance based on time would be difficult.
I was impressed how clearly images were being transmitted using sonic waves though water. Wasn't sure if air density/moisture was something that could be accounted for or not - as yet. They have done amazing things with sensing different emissions (light, sound, microwaves, radar, etc) since I started surveying that its hard to keep up with it all.
Yes, the speed of sound in air is much more variable due to environmental effects than is the speed of light.
We have an old SONIN60 that measures with sound. The newer seems more reliable SONIN250
The older was not overly reliable...