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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.
How loud is too loud?
Continued exposure to noise above 85 dBA (adjusted decibels) over time will cause hearing loss. The volume (dBA) and the length of exposure to the sound will tell you how harmful the noise is.
In general, the louder the noise, the less time required before hearing loss will occur.
Point of Reference
Points of Reference *measured in dBA or decibels:
- 0 The softest sound a person can hear with normal hearing
- 10 normal breathing
- 20 whispering at 5 feet
- 30 soft whisper
- 50 rainfall
- 60 normal conversation
- 110 shouting in ear
- 120 thunder
Air Testing
As part of thermographic surveys we can also use an air Pressure testing kit to depressurise the building and help detect any air leakage within the property
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