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A typical person with good hearing can hear from about 20Hz to 20kHz (the audio bandwidth). A person's voice will usually range from 500Hz to 2kHz...more

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10 dBA is the sound level of normal human breathing. To put it into perspective, thunder is a whopping 120 dBA...more
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Hawes - Ventilation Commissioning Certificates - 01924 578 029
The office that covers this area is: Wakefield
Phone Number: 01924 578 029 Email: hawes@e2consultants.co.uk
Our other services include:
Ventilation Commissioning Certificates can also be known as:
Air Flow Rate Testing, Duct Testing, Part F Fan Testing, Part F Ventilation Testing, Ventilation Commissioning Certificate, Part F Testing, Part F Ventilation Certificate, Ventilation Testing Equipment,


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