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
Mercedes Benz Air Test
E2 Consultants were asked to carry out a commercial air test on a prestigious new Mercedes Benz dealership in Cheshire Oaks.
All ventilation was sealed externally by the customer in preparation for the test, as per our pre-site set-up notes. These were checked for their air integrity before the test began.
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