200000
They have all done poorly in long term testing. I am surprised they are still for sale. many found out the hard way. Sorry, but I would n't recommend getting any of these types of pest repellants.
industrial applications of ultrasonic waves: 1. ultrasonic welding 2. ultrasonic cleaning. 3. ultrasonic drilling. 4. ultrasonic soldering. +++ 5. Flaw detection in metals etc. And many others if you stretch the term "industrial to include, say, medical!
3
Many animals can detect ultrasonic frequencies, including bats, dolphins, and certain species of rodents. Bats use echolocation, emitting ultrasonic sounds to navigate and hunt for prey. Dolphins also utilize echolocation, with their vocalizations reaching ultrasonic levels to communicate and locate objects underwater. Additionally, some dogs and cats can hear ultrasonic sounds, which are inaudible to humans.
how many people work in the war memorial today how many people work in the war memorial today
Today the average is 790000 people :D
About 12.5 millions people are without Job today.
to many....
How many people live in fawkner today
Approximately 476,892.765 people had coke today
there are about 135 people in slavrey
Many - fish finders, many sonar devices.