Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Why the speed of sound is almost 340 m/s in the air?

Status
Not open for further replies.

epilot

Member level 2
Joined
May 2, 2006
Messages
46
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,642
Hello.

Why speed of sound is almost 340 m/s in the air?

I would like to know if it is the air impedance that makes the sound to travel at that speed?

hope to get any response
 

nanda_kishore

Member level 1
Joined
Mar 8, 2007
Messages
34
Helped
7
Reputation
14
Reaction score
0
Trophy points
1,286
Activity points
1,562
sound speed!

Hi,

If you observe.. sound speed in air is 330m/s, when inliquid it is 1497m/s and in solids is 5100m/s. This varience is because sound is a mechanical wave and it badly needs a medium to propagate..(thats why sound waves doent propagate in vaccum.)
So, you know density of (gases < liquids < solids) which means molecules(medium of propagation for sound) in gases are farther from each other when compared to liquids which inturn are again farther when compared to solids.. so a molecule should carry the sound wave to the next molecule..which takes more time in gases than in liquids which inturn takes more time than solids..

hence it takes longer time to propagate in gases.. hence lower speed in gases than liquids inturn in solids..

The loss of enery is also greater in gases than liquids inturn greater than solids..

Added after 3 minutes:

In first line.. speed of sound in air , liquids, solids are only approx nos.. and the speed varies wrt temperature, density, altitude and other conditions.. check wikipedia for more info..
 

pmonon

Full Member level 3
Joined
Jan 28, 2006
Messages
155
Helped
7
Reputation
14
Reaction score
1
Trophy points
1,298
Activity points
2,243
Re: sound speed!

The speed of sound or any mech. wave depends on the density and elasticity of the medium.
 

Naveed Alam

Full Member level 5
Joined
Jan 6, 2006
Messages
287
Helped
16
Reputation
34
Reaction score
3
Trophy points
1,298
Activity points
3,250
Re: sound speed!

epilot said:
I would like to know if it is the air impedance that makes the sound to travel at that speed?

It depends on the type of medium.


Naveed
 

nonlinear

Junior Member level 3
Joined
Jan 29, 2007
Messages
25
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,435
sound speed!

The speed of sound in the medium depends on the medium properties such as density and elastic constant, the bulk modulus.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top