Why does our garden waste wheelie bin have a 89db rating on it?
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Answers:
That's a quiet one. Mine are both Lwa 99dB. It's the amount of racket the bin makes when the lid slams or it's being wheeled over a surface or is on the back of a rubbish truck. Marking the noise level on the bin is part of the CE marking process.
Just ignore it, that's info for the Grouch (Sesame Street).
That's probably over-bureaucratic nonsense from the Health and Safety people, to alert the dustmen (do we still call them that) that the bin produces above the legal safe limit of noise, currently 85dB(A), and that they should wear hearing protection when wheeling it.
Two points on this:
1. 85dB(A) as a safe limit is based on an 8 hour day so you have to be wheeling bins for just under 4 hrs per shift to be damaging your hearing (you halve the exposure for each 3dB above 85dB(A))
2. 89dB is meaningless without qualifying what your dB is referenced to, ie it means nothing without the (A) afterwards (or B, or C, or HL).
O level physics... empty vessels make the most sound.
You need a much higher rating to be an MP
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