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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
Environmental Noise Levels
The max exposure time at 85 dBA is 8 hours, at 110 dBA it's just 1 min 29 seconds. If exposed, limit the time and wear hearing protection...more
The Government’s national calculation methodology for assessing water efficiency in new dwellings.
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