Sound speed = ultrasound speed?

AI Thread Summary
Ultrasound is a type of sound with a frequency beyond human hearing, but it travels at the same speed as other sound waves in air. The speed of sound is generally independent of frequency, although slight variations can occur under different conditions, such as low pressure. For most practical applications, including lab reports, this difference is negligible. Therefore, ultrasound speed in air can be considered identical to sound speed in air. Understanding these principles is essential for accurate scientific reporting.
bznm
Messages
181
Reaction score
0
Hi, I'm doing a lab report and I need to know if ultrasound speed in the air is the same of sound speed in the air.
Thank you
 
Physics news on Phys.org
Ultrasound is just sound with a very high frequency such that we can't hear it. Therefore, yes, it is identical to any other form of sound, including its speed in air.
 
bznm said:
Hi, I'm doing a lab report and I need to know if ultrasound speed in the air is the same of sound speed in the air.
Thank you

boneh3ad said:
Ultrasound is just sound with a very high frequency such that we can't hear it. Therefore, yes, it is identical to any other form of sound, including its speed in air.

Lookes like boneh3ad is right: http://hyperphysics.phy-astr.gsu.edu/hbase/sound/souspe.html

.
 
Speed of sound is very nearly independent of frequency, but not quite, (see A B Wood, A Textbook of Sound (Bell, London, 1946))

For your purposes I doubt it would make a difference. However for low pressures it might.
 
Thank you very much ;)
 
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Hello everyone, Consider the problem in which a car is told to travel at 30 km/h for L kilometers and then at 60 km/h for another L kilometers. Next, you are asked to determine the average speed. My question is: although we know that the average speed in this case is the harmonic mean of the two speeds, is it also possible to state that the average speed over this 2L-kilometer stretch can be obtained as a weighted average of the two speeds? Best regards, DaTario
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Back
Top