The results were then downloaded and reports were run using the insight software. The information we were most interested in was the LAeq (which is the average sound level), the LAFmax (highest reading under A weighting in Fast mode), LCPeak (absolute highest sound pressure with time weighting) and the projected 8 hour dose (what we’d be exposed to if we stated there for 8 hours). We also ran octave analysis to see which frequency bands had the highest levels."
"Discussion
The results from our 15 minute test show that the average sound level we were exposed to in the night club was 106dB, and the projected dose for 8hours exposure was 106dB. This is well above the exposure standard for noise of 85dB, which is set at that level because above it an unacceptable risk of hearing loss occurs. At these levels, without hearing protection, the daily noise exposure limit would be reached in approximately 3 minutes and 50 seconds. So, at these levels, within 4 minutes you would be damaging your hearing.
The LCpeak reading attained during the test was 130.8dB. The National Standard for Occupational noise requires that the loudest LCpeak you can be exposed to is 140dB. This means that the readings we took were not above the recommended limit for peak sound pressure level, however it was still very high. Octave analysis of the noise data shows that the loudest sounds were between the 125Hz to 4Khz range, and it peaks around the 500Hz range. It’s in this frequency range that you would find electric guitars, piano, vocals, and some drums and bass, which probably explains why the sound level peaks in this frequency range.
In conclusion, if you’re heading out for a night on the town, take some hearing protection or consider sticking to a quieter pub or bar."
As for loud music at the disco, it's not something I need to worry about anymore. I can't even remember the last time I went out to a disco. Concerts, on the other hand, can happen that I go to, plus all possible other loud noises that I am exposed to. Old roaring two-stroke outboard motors, various power tools, lawnmowers and so on.
