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What is NRC ( Noise Reduction Coefficient)?

Saturday, 21 September 2013 4:03:40 AM Australia/Sydney

Sound absorption properties of acoustic materials can be measured in lab tests. Specifications for materials used in sound absorption commonly include an NRC (Noise Reduction Coefficient).

The Noise Reduction Coefficient (NRC) and Sound Absorption Average (SAA) values are both single number ratings that indicate the level of sound absorption provided by the product being tested

For example, an NRC of 0 indicates perfect reflection; an NRC of 1 indicates perfect absorption.

Sound Absorption Average (SAA) is the average of the absorption coefficients for the twelve one-third octave bands from 200 to 2500 Hz.

NRC provides very simplistic and average indication of absorptive properties of the material, because it is simply the average of the mid-frequency sound absorption coefficients (250, 500, 1000 and 2000 Hertz). For example two materials may have identical NRCs, but do not perform identically in individual bands and may be direct opposites in the spectrum of frequencies they absorb.

 

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Connecting YOU to the Voice Over World!

Thursday, 25 July 2013 10:02:04 PM Australia/Sydney

VoiceWorld was a successful event for VocaBoothToGo.com, a sponsor of the event. We met with many voice actors and even musicians who were interested in our acoustic products, especially our vocal booths. In fact, we had a crowd -- many were ready to walk-off with our displays!

If you didn't get a chance to see our booth or any of the exhibitors at VoiceWorld Toronto, no worries!  We ha€™ve brought them to you. Here is a list of exhibitors and speakers that you may want to connect with.

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What is the difference between soundproofing and acoustic room treatment?

Wednesday, 10 July 2013 4:55:47 PM Australia/Sydney

Soundproofing and acoustic room treatment should be looked at as two completely  separate, but equally important projects. So what is the difference  between acoustic treatment and soundproofing?0

If you have Noise related problems caused by a flying jet or lawn mower, and/or  neighbors complain0ing,  you need soundproofing.  Sound proffing - is creating a soundproof barried to block the sound trasmission coming in or out of your recording studio.

If your studio is relatively quiet, but your recording sound bad - you need acoustic room treatment.  Chances are the ssound bounces off the walls and gets picked up by the microphone.   Soundproof products are not goinbg to help, you ned sound absorption, diffusion, changing rooms shape or otherwise acoustic room tune up.

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Principles of Soundproofing

Wednesday, 10 July 2013 4:54:29 PM Australia/Sydney

To soundproof a room use the following general principles:

Mass -- use heavy materials

Air-tightness -- cover the whole enclosure airtight

Flexibility -- keep it limp, better to overlap, than stretch tight

Isolation -- separate (decouple) from surrounding structure

Although each project has to be considered individually, the above principles are relevant in most cases.

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