Which of the phenomena is taking place when sound waves are reflected from a suface along parallel lines?
104416
It looks like diffusion. \nSound waves are reflected between parallel lines so that the mulitple reflections makes sound waves diffuse from one point to other. This is the best logical explaination i can think of. But additional info on this question can help to explain further.
913737
In physics it is acoustics.
134593
The subtle differences in atmospheric pressure at ground level will not contribute to changes in sound waves. Although this is a viable concept because sound is a wave and the atmospheric pressure will change its progression through that environment, thus changing the sound and if our ear is in the same pressure the interaction upon our ear as well.\n\nI suspect other noises act as a source to drown out the airport noise at certain time and not at others. For example, in a crowded mall ever notice how hard it is to carry on a simple conversation with someone next to you, however in a quiet room you can hear you dog let gas go! Sound waves combat other sound waves, and the strongest will win. Strongest being in most cases the one closest to you.
1023833
i usully see it with mine aswel but you know when the wave move it moves in both directions and make a stand wave wich has a still point and a high displace point and in the guitar u'll see a wave with crecentic multiple waves and if you see rectangle then its the illution caused by light!!! >>>>>
491121
The sound waves are vibrating particals so can move freely and bend rather than light only travels in straight lines.
971127
The sound intensity due to a point source radiating equally in all directions (spherically symmetric case) is proportional to 1/r^2, where r is the distance from the source of the sound:\n\nI = k/r^2, where k is a constant of proportionality.\n\nIf we know the intensity (I1) at one distance (r1), then the intensity (I2) at a second distance (r2) is given by:\n\nI2 = I1*(r1/r2)^2\n\nIn Q1, we are told that the sound intensity at 1 m is 10^-5 W/m^2, and we want to know the intensity at 5 m.  Plugging these values into the above equation, we have:\n\nI2 = 10^-5 W/m^2 * (1m/5m)^2 = (10^-5 W/m^2)/25 = 4*10^-7 W/m^2\n\nThe intensity of a sound wave is proportional to the square of the amplitude of the displacement of a particle in the medium through which the sound is propagating:\n\nI = m*x^2,\n\nwhere m is a constant of proportionality, and x is the amplitude of the displacement.  Plugging this into the equation above that relates intensity and distance, we have that:\n\n(x2)^2 = (x1)^2 * (r1/r2)^2\nx2 = x1*r1/r2\n\nThe amplitude of the displacement is inversely proportional to 1/r.\n\nFor Q1 we are told that x1  = 70 microns at 1 meter, and are asked what x2 is at 5 meters.  Plugging these values into the above equation, we have:\n\nx2 = 70 microns * 1/5 = 14 microns\n\nFor Q2, we are told that x1 = 10^-7 m at r1 = 3 m, and are asked what the amplitude is at 5 m.  Again plugging these into the above equation, we have:\n\nX2 = 10^-7 m * (3/5) = 6*10^-8 m
49424
Not neccessarily.  But it is not because the sound waves are being affected by gravity.  It is because the medium that the sound travels through is affected by gravity.  The air is thicker at the 1st floor and thinner at the 10th floor.  To make an extreme example it would be like passing sound through water at the 1st floor and air at the 10th.  So yes it will be different sounds but because of the effect of gravity on the medium not the waves.
710254
I think the St. Louis Arch is a partial parabola. Or how about a satellite dish?\n\nHere's another interesting phenomenon. Some museums set up devices that look like satellite dishes so you can try out a similar effect:\n\nWhispering Gallery in NYC\nTalk into one corner of this room and your friend in the other corner will hear it.\nSounds do interesting things in round shapes, parabolas will bounce sound from a large area into one spot, or from that one spot to a large area and are used extensively in theaters. Another interesting phonomenon is a Whisper Gallery where you can stand along one wall and sound bounces along the sphere, travelling straight and then bouncing off the wall until it hits the wall again, continuing around the inner surface of the circle.\n\nWell, I just learned that there's one in Grand Central Station.\n\nIn the arched hallway outside the entrance, check out the engineering magic of the "whispering corners." When you and a companion stand in opposite corners and whisper, you can hear each other as well as if you were standing a foot apart.\n - http://www.newyorkmetro.com/pages/details/4218.htm
804912
Since your ears are separated from each other by a fixed distance, one ear generally receives the signal before the other one does.  Depending upon the differential between the two, your brain computes the angle from which the sound originates.  If both hear it at the same moment, it is coming from directly ahead or behind.
221191
i agree.  sound waves are comparable to waves in a fluid, like water.  A good way to test the reflectivity of a material would be to see how strongly water ripples would bounce off of a wall made of that material.  If you picture disturbing water near a submerged marble wall, you could imagine that the waves would bounce off quite neatly compared to how water may reflect waves from a styrofoam wall or a rough, jagged rock surface.  So, bottom line, dense smooth surfaces produce the best echo.
388065
This is due to the doppler radar effect.  The wavelength of the reflected sound waves from an object travelling toward you is short (blueshift) whereas the wavelength from a receding object is long (redshift)
577560
http://en.wikipedia.org/wiki/Sound_waves
864873
Not on any realistic scale.  The particles in matter move according th the net of all the forces acting on them, including gravity.  Sound is a disturbance to the position of those particles, which propagates as a compression wavefront.  Gravity affects the steady-state behavior of each particle.  Sound just creates a short-term displacement.
129199
All light waves dissipate through space in a wave function pattern.  When they interact with obstacles, these wave patterns can cause interference patterns like waves of water.
1060331
Electromagnetic waves. When a wave reaches a surface seperating two media refraction occurs.
970598
Try this website for information on transverse and longitudinal waves:\n\nhttp://www.kettering.edu/~drussell/Demos/waves/wavemotion.html
211442
Because there is no air - only a vacuum.\n\nSound travels by making waves in the air.  Without air (or some other medium, like water) sound can't be transmitted.\n\nRadio waves, on the other hand, travel through a vacuum without trouble.