0
We will find surfaces that are hard and flat to be the best reflectors of sound. To understand why, we need to review a couple of things about sound. Sound is mechanical energy. The source of the sound will put the sound (mechanical) energy into the medium through which that sound is going to travel. This causes some movement in the medium through which the sound is propagating. Surfaces that reflect sound best will not absorb the sound energy by moving. These surfaces will resist any movement and will thus not take any energy from the sound wave. This said, we'd expect a foam rubber wall will reflect far less sound energy than a concrete wall. Also, a wall that is flat will cause less scattering, which is a distributed redirection of the sound. A flat wall will allow sound to be reflected directly back toward the source (for sound arriving at a right angle to the wall). A wall that is made of cemented river stones, which are rounded, will scatter some of the sound energy and be less as good a reflector of that sound compared to a flat, smooth concrete wall.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoA2. Sound requires a medium in which to travel. This medium has spring and mass characteristics. When sound meets a surface with very different spring and mass characters, most of the sound will be reflected. This material will be a sound barrier - provided it doesn't have holes in it through which the sound would bypass the massive properties. Concrete would be an example of this, and gypsum wallboard is another.
Contra with sound absorbers. For these we need a light weight material with considerable porosity. Examples would be fibreglass blankets, polyurethane wedges (as you'll see in anechoic chambers), and similar.
There is a special class of sound absorber in which the sound wave is reflected back 1/2 wave out of phase, and thus cancellation of the sound will result. These are called reactive sound absorbers, and one area where this technique is commonly used is in auto mufflers. [The US usage of muffler is more accurate than the European one of silencer.]
A1. rough soft surface; better if deep troughs with air pockets, so to allow sound waves to enter, bounce around, and be attenuated before exiting
Wiki User
∙ 13y agoif the surface is hard, it's easier to absorb sound. so, it reflects better soft.
Add your answer:
Earn +20 pts
What The total water vapor released from soil and ocean surfaces as well as from plant leaves is called .?
Evapotranspiration
Why is it so quiet after a snowfall?
Two answers: first snow does not reflect sound well, it absorbs it so that much of what you would normally hear is muffled. Secondly, most animals seek shelter when it snows and therefore there are many less bird sounds immediately after a snow storm.
Is Mercury atmosphere thick or thin?
mercury's atmosphere is thin so sound waves don't travel very well and there is little oxygen.
What are facts about tundra biome?
well obviously its the kind animals that are actually able to survive there.Like what kind of question is that?
What factors affect albedo?
Albedo refers to reflectivity of visible light, so anything that reflects light well will increase albedo. Clouds and ice are the two main things that reflect well, so any celestial body with either clouds or surface ice will shine pretty bright. This is one reason why Venus is so bright seen from earth. It has bright cloud tops that reflect the sun's light efficiently.
Why echo is not produced in many places?
Some surfaces reflect sound well, others don't.
Can sound travel around corner?
Sound certainly can travel around corners. Sound can also travel through hard surfaces like walls and bathroom surfaces as well.
What kind of surfaces can boxing be played on?
well it has to be square flat surface
Do evergreens help to cancel out noise?
Evergreens do not reflect noise well so they do act as a sound buffer.
Does a rough surface reflect light in many directions?
Highly polished, shiny surfaces reflect light the best as they are REFLECTive. White or bright surfaces also reflect light well. Dull, Matt surfaces are the worst reflecters of light
What property of dark surfaces enable them to absorb heat radiation?
"dark" implies that the object does not reflect light very well - thus it must be absorbing radiation.
Why is it so quiet after a snowstorm?
Snow does not reflect sound well, it absorbs it. So everything you would normally hear after is muffled.
My caravan has strange sounds what can i do?
Well what kind of caravan is it? What kind of sound? how long has this sound been occurring? you need more information to answer. Who drives a van lol jking
What sound does a killer whale make?
well the sound that it makes is kind like a crying sound, or mostly like a whistle!
What type of surfaces are good radiators of heat?
Dull black surfaces they are also best at absorbing it as well. [Shiny and silvery or white surfaces are poor radiators and absorbers of heat. However they are very good in reflecting heat radiation.]
What are the best absorbers of thermal radiation?
Black, dull surfaces are the best absorbers of thermal radiation because the heat doesn't reflect off it unlike shiny surfaces.
What objects do reflect light well?
reflect light well-normally shinysmooth pale colour objects: mirror, glass, shiny metal, tin foil...these objects favour a good image due to the reflection of light is regular do not reflect light well-usually rough, matt , dark colured objects: tree trunk, car wheel, dark carboard, brick, stone, dark opaque plastic... These objects diffuse the picture or do not giva a picture at all because reflected light is irregular.
