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Noise in the Scale of C !!!

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foolestroupe:
I'm still laughing - and crying - crying that we have this sort of person as an elected member of Government...

I have lodged a complaint about the excess level of noise from a certain musical event. I discovered that the legislation refers to all noise - no matter what source is to be measured on the "A" frequency weighting network - even though this cuts off massive amount of Bass and middle and 'Music' should really be measured on the "C" frequency weighting network...


I have just received the following delightful paragraph in a letter from the Queensland Minister for Environment & Multiculturalism

Quote

Mr XXXX has suggested that the "A" frequency weighting network as prescribed in the Environmental Protection Regulation Regulation 1998 and Queensland Environment Protection Agency - Noise Measurement manual for the measurement and control of environmental noise is inappropriate for measurement of music that is performed in a C scale. However the "A" weighting network is applied across the entire spectrum of audible frequencies and should not be mistaken as having any relationship to a musical scale.

Unquote

ROFL...

Now, I don't have an engineering degree (even thought I DO know EXACTLY what I am talking about with regard to this!), so who can help me make them understand?.... :-)

Some lawyers who have experience internationally wouldn't go astray either.... :-)

As a free-lance journalist - what with an election coming up soon, I can see that I am going to have some fun with this...

The Toowoomba Chronicle (and the local radio and TV stattion) gives the AGMF event lots of publicity before and after the event - so this is headed your way - for a start!  :-)

Nick 2:
you sound like a spoilsport and a whinger. shot in the dark here, i reckon you're an anglo

what is this 'frequency weighting network' you speak of

Lord Biscuit©:
The Toowoomba Chronicle? You think anyone here know anything about some hick-town rag? You people really do have too much time on your hands. Next thing you'll be telling us you'd rather die of thirst than drink recycled water!  :lol:

Pertinax:
This from the University of NSW, Physics Department.

The filters used for dBA and dBC

The most widely used sound level filter is the A scale, which roughly corresponds to the inverse of the 40 dB (at 1 kHz) equal-loudness curve. Using this filter, the sound level meter is thus less sensitive to very high and very low frequencies. Measurements made on this scale are expressed as dBA. The C scale is practically linear over several octaves and is thus suitable for subjective measurements only for very high sound levels. Measurements made on this scale are expressed as dBC. There is also a (rarely used) B weighting scale, intermediate between A and C. The figure below shows the response of the A filter (left) and C filter, with gains in dB given with respect to 1 kHz.

They say the "C" weighting scale is only good for "subjective measurements only for very high sound levels".

In Queensland, the acceptable level for most licensed venues is 82 dBA at the nearest residence likely to be effected. Hardly what you'd call a high sound level.

Kelchables:
according to our dB sheet we got in music industry, 120dB is the average sound for a plugged in rock band to get to.


and it would maybe also be 82 dB as that level of sound can cause hearing damage after eight hours. and that's a pretty lengthy space of time. 

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