Welcome, thank you for the opportunity to address your question.
In order to provide you with a more focused answer I need a bit more information:
The Gauteng Provincial Noise Regulations 1999 apply to your property. The way the regulations work is that you are not allowed to create a disturbing noise, which in the case of Residential 1 zoning is a noise more than 40 dB(A) above the ambient noise level.
What this means is that there is a residual level of ambient or background noise which varies during the time of day and according to the position of the property. Usually there is a lot more background noise during daylight and therefore televisions, radios etc may be played at significantly higher volume than in the night when the ambient noise level subsides. In order to successfully prosecute under the regulations there would need to be a noise control officer in the local authority, who would issue a compliance order to the owner of the property should a noise nuisance emanate from a property, should more than one compliance order be issued then the owner may be fined usually R500 in a residential area but can be increased up to R20 000 and/or short term imprisonment in gross cases.
The noise has to be measured by a specialised instrument in terms of specified standards.
The regulations regarding times are for construction activities in noise controlled areas.
It is little wonder why very few officials are informed or keen on enforcing noise regulations. One can always apply to court to have any fine set aside should a person be aggrieved thereby and this would put the local authority to a significant standard of proof.
I trust that the general overview of the noise regulations provides insight into your current position.
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