content-type:text/html; charset=UTF-8 vary:user-agent x-nitro-rev:901250f link:; rel=preconnect link:; rel="https://api.w.org/" x-cache-ctime:1669300784 Technical Archives | A turnkey solution to providing Acoustic Excellence

Technical

  • 16
    Sep

    Acoustic Terms

    Disturbance. A general acoustic term describing a parameter in some system that is time varying.  We could say the angular displacement of a pendulum is a form of disturbance, as is the acceleration of a vibrating floor. Frequency. Frequency is a measure of the number of occurrences of a...

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  • 16
    Sep

    Understanding NRC Values

    Noise Reduction Coefficient or NRC is single number value ranging from 0 to 1.  This number describes the average absorption value of an acoustic material and in no way does it relate to noise control.  The naming is ambiguous and is more accurately described as a Sound Absorption Average...

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  • 13
    Sep

    Noise Disturbance

    The Bylaws pertaining to Noise Disturbance in South Africa may vary between Municipalities and Provinces.  Below is the Bylaws for Ethekweni Municipality, KZN, South Africa. Noise levels at night time should not exceed Outdoors – Night Time – Lreq, n 50dBA Indoors, with open windows – Night Time –...

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  • 13
    Sep

    Noise in our daily lives

    A few examples of A-weighted sound pressure levels that we encounter as noise in our daily lives.   140 dB(A)       Threshold of Pain. 120 dB(A)       Jet Aircraft at 100m. 110 dB(A)        Inside a very noisy factory. 100 dB(A)    ...

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  • 08
    Jun

    The Measurement of Sound

      Sound is an aural sensation caused by pressure variations in the air.  The variation is always produced by some source of vibration for example a solid object or from turbulence in a liquid or gas.  These pressure fluctuations may take place very slowly, such as those caused by...

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