Sound waves Definition and 316 Threads

A microphone is moving in air toward a stationary source of sound (speed of sound = 343m/s). The detected frequency is 82.7Hz greater than the emitted frequency. When the microphone moves at the same speed toward the same stationary source in a liquid, the detected frequency is only 21.6Hz...

The graph shows the US Department of Labor noise regulation for working without ear protection. A machinist is in an environment where the ambient sound level is of 85dB, i.e., corresponding to the 8 Hours/day noise level. The machinist likes to listen to music, and plays a Boom Box at an...

A stationary motion detector sends sound waves of 0.700 MHz toward a truck approaching at a speed of 38.0 m/s. The speed of sound in the air is 343 m/s. What is the frequency of the waves reflected back to the detector? I tried doing F=f((v+vo)/(v)), which becomes F=.7MHz((343+38)/(343)), and...

Question regarding on sound waves. -------------------------------------------------------------------------------- Hello,I just join in as member yesterday.Sorry to interrupt that I have question to ask.Here's the question. 1.Two small speakers emit sound waves of different...

Is it true that people can sing better inside a bathroom? How could that be? Other links in internet tells about that Walls of Jericho (Old TEstamament). Joshua and his men surrounded the city, blew their trumpets and shouted very loudly... then the wall crumbled... I always thought of...

is there any relations for light waves to affects sound waves? :biggrin:

what is the optimum air pressure for sound waves? is there a graph that i can look at that ranges from 0 bar (or whatever it's measured in) to such high pressure that the air is almost a solid. what would you measure the flow of sound waves in?

Hello I am trying to solve a problem: You drop a stone into a well and hear the splash 1.47 s later. How deep is the well? Answer is 10.2 but how do I solve it? D = (0.5) gt squared D = VT

how are we able to clearly distinguish two different sound waves - like when someone is talking to us while music is playing in the background... I've read it is due to the superposition principle which states that the waves combine and form a resultant wave that is the sum of the individual...

How does the amount of energy effect a wave? Does it affect the speed or the frequency or the wavelength?

What about using soundwaves from mines and waterfalls as an energysource? you could put a membrane in the exit of the mine, or over a waterfall. Then we would get energy without killing the fish! How about periodically fill a volcano with saltwater and use the steam as an energysource like...

CAn someone explain how sound waves is modulated into Am and FM carrier waves? I only have a poor illustrarion i don't understand.

Can sound waves be created that are coherent in the same way that laser light is coherent? I would guess not, because sound is a compression of the air in which it travels and could not be directed. Does anyone know for sure? Thanks!

I've been searching for a long time now, I hope some one knows something about it. I heard that when u speak the sound waves do not vanish, they go into outerspace and stuck there, now scienets are trying to find a way to get the sound waves back and hear what old people siad (specially...

I've been stuck on this one problem for a bit, any help is really appreciated. "A loudspeaker is placed between two observers who are 110m apart, along the line connecting them. If one observer records a sound level of 60.0 dB and the other records a sound level of 80.0dB, how far is the...

[SOLVED] Sound waves and gravity question Just a small question: are sound waves affected by gravity, and can thye have an initial and final velocity, or do they always have a constant velocity and do not need to accelerate?