EPDRStandards - EPDRStandards

AS/NZS 1269.1:1998 Occupational noise management - Measurement and assessment of noise immission and exposure

AS ISO 1999-2003 Acoustics - Determination of occupational noise exposure and estimation of noise-induced hearing impairment

ISO 1999:1990 Acoustics; determination of occupational noise exposure and estimation of noise-induced hearing impairment

ISO 9612:1997 Acoustics - Guidelines for the measurement and assessment of exposure to noise in a working environment

BS 5330:1976 Method of test for estimating the risk of hearing handicap due to noise exposure

But i thinks Ill use the workcover ratings, much clearer and weildy

85dBlAeq 8hr 135 dbC peaks

24/8/04

In regards to vibration: (derek again)

AS 2670.1-2001 Evaluation of human exposure to whole-body vibration - General requirements AS 2670.2-1990 Evaluation of human exposure to whole-body vibration - Continuous and shock-induced vibration in buildings (1 to 80 Hz)

That is the main Aus/NZ standard dealing with vibration and humans - and gives a scale of likely response, from unnoticeable through annoyance, to building damage. It is based on the british standard (almost word for word), and takes some getting used to the way it is structured. And it goes on with a Part-4 that deals with vibration and rotational motion for human comfort relating to train movement and vibration. At a guess though I would say adverse effects are unlikely until you actually start hitting someone repeatedly with substantial force. If you're subjecting them to vibration similar to what you'd experience standing on a train - let alone just a typical dance floor - I can't see what serious ill-effect it might have.

Also maybe of relevance there is... AS 2993.1-1987 Vibration and shock - Dynamic characteristics of the human body - Driving point impedance of the human body

AS 60068.2.65-2003 Environmental testing - Tests - Test Fg: Vibration, acoustically induced

AS 2641-1983 Vibration and shock - Balancing - Vocabulary

Entry2

Workcover gives a vague summary of Leq with time... http://www.workcover.vic.gov.au/vwa/home.nsf/pages/so_noise_exposure

Leq Stands for the "Equivalent Sound Pressure Level", and is always refernced to the time period it is measured (or predicted for) i.e. Leq,8hr or Leq,24hr etc. (And an Laeq,8hr is of course the "A-weighted 8-hour Equivalent Sound Pressure Level")

Equivalent means basically just that... The equivalent continuous sound pressure level, or the constant SPL that contains the same total energy for a time period as the varying level actually measured.

To work out a level based on a given Leq over time(T), and a time you want to use (t)... L(t) = Leq + 10log(T/t)

Or given an Leq of 85dB... L(t) = 85 + 10log(8/t)

So, if you want to keep to 85dB LAeq?,8hr over a 45min period (i.e. 0.75hr) you have 85 + 10log(8/0.75) = 95dB(A) i.e. blasting people with 95dB(A) for 45mins is energy equivalent to blasting them with 85dB(A) for 8 hours.

This gives a 3dB change for each doubling or halving of time exposed (as listed in Workcovers table on the web.