553382830-Sound-Reflecting-Materials.pptx

553382830-Sound-Reflecting-Materials.pptx

1. Sound reflectors are acoustical materials used to reflect and concentrate waves of sounds to a particular point. This property helps in amplifying sounds without the use of artificial amplifiers. This is generally avoided in smaller spaces as concentration of sounds results in high intensity sounds which are harmful. Gypsum boards, vinyl or fabric-finishes are commonly used reflective materials . S ound reflecting materials

2. Sound Reflecting Materials- Solid Surfaces They are best sound reflecting materials as they don’t allow sound waves that are travelling in the air to be absorbed by their surface and reflect back all or a major part of those sound waves. These are non-porous materials as porous materials often allows most of the sound to pass through them or get absorbed . Porous materials often absorbed sound waves and it gets trapped in it’s spaces , hence no or just a small part of it reaches us , but this doesn’t happen in case of sound reflective materials , as they reflect the sound back

3. EXAMPLES OF SOUND REFLECT NG MATERIALS 1)MARBLES Marbles being a hard surface reflects much of the sound as the absence of soft surface doesn’t absorb any sound. Marbles are used in spaces like office and not other big spaces where there is no problem of echo. 2) METAL Metal being a good solid surface reflect sound waves .Metals are a great generator of sound as well , hence used in door bell and many other sound making instruments

4. 3) GLASS 4) PLASTER SURFACE Glass along with being a good reflector of light , is equally good reflector of sound too. Glass with solid surface reflect sound the best rest rough glass are medium in respect of reflecting back sound . Glass structures are found in Opera houses etc ,where absorbing of sound is not needed Plaster surfaces reflect sound too as they don’t have a porous or surface which have lots of small spaces to absorb sound. They reflect back almost all of the sound without absorbing much.

5. SOME OTHER GOOD SOUND REFLECTING MATERIALS- GYPSUM BOARD Gypsum boards have a plain surface , so they make their place in the list of good reflectors of sound GRANITE Granite is unable to absorb sound since there is no space in it’s surface to trap or absorb sound

6. CERAMIC WALL Ceramic walls too make their name in the list of materials that reflect sound being having a plain surface that reflects back most of the sound BRICK WALLS Brick walls which generally don’t have too much porous surface too are counted as good reflectors of sound PLASTIC SURFACES Plastic surfaces too reflect sound instead of absorbing it and thus are included in list of good reflectors of sound