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Good Hearing?
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

Point of Reference
10 dBA is the sound level of normal human breathing. To put it into perspective, thunder is a whopping 120 dBA...more
Letchworth - Duct Testing - 020 3390 0301
The office that covers this area is: London
Phone Number: 020 3390 0301 Email: letchworth@e2consultants.co.uk
Our other services include:
Duct Testing can also be known as:
Ventilation Commissioning Certificate, Part F Testing, Part F Fan Testing, Ventilation Testing Equipment, Part F Ventilation Certificate, Air Flow Rate Testing, Part F Ventilation Testing,


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