Why do low frequencies produce low pitch and why are only longitudinal waves in fluids?

[noobie!]

seeking help..please

why do low frequency contributes a low pitch?how?& why only longitudinal in fluids?can any1 please explain to me,tq please..

 

[russ_watters]

The first one, I'm not clear what you are asking: pitch and frequency are just two different words that mean the same thing.

For the second part, you don't get transverse waves because the only way air molecules interact that can produce waves is via pressure. They are not connected to each other, so if one slides past another, there is no force to bring it back to where it started.

 

[Naty1]

A low frequency sound wave has a low "pitch", that is is sounds "low frequency" because our eardrum vibrates more slowly and we interpret that "speed"...Is that what you were asking??

 

[noobie!]

yes,thanks a lot...can i ask a que...the doppler effect actually has 8 cases which involves relative motion between a source and observer..so generally they only have 3 formulas only m i right?