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The wind turbines are as well as the power stations, not instead of them.

24 April -  Open Garden Fund Raising - Control of wind farm noise

£175 donation now sent to support the Den Brook Judicial review.

This year the garden at Maspin House has recovered well from the exceptionally cold winter and this spring the garden looks especially good.

The garden was open on Easter Sunday and attracted over 40 visitors. Visitors donated  £175 to a collection to help Den Brook with their legal challenge concerning wind farm noise limits.

The 2 acre garden was the main attraction, but a display of information about Mega Watt Valley and the proposed wind farms with over 220 turbines was of great interest to visitors.

To explain the need for better protection from noise for people living close to turbines a recording of turbine noise was played. The recording had been made at a home in Lincolnshire and was played on a hi-fi system while the data was displayed in graphic form on computer screen. The phenomena that causes problems for people is called “Amplitude modulation “ and the computer display enabled it to be explained. The eerie rumbling noise was played in the barn but once the noise got into your head you could hear it in many parts of the garden, which showed how intrusive and annoying wind turbine noise can be.  

The rules which limit wind farm noise use very obscure measurements. Instead of taking the loudest noise pulse in the turbine noise, or even the average noise level they measure something closer to the lowest level of noise. The measure is called LA90 and is the level of noise that is exceeded for 90% of the time. Further explanation.  Wind turbines make a pulsing, or swishing sound - the Amplitude modulation. It is the the loudest part of the swish that causes the problems and not the lowest level of noise. The LA90 measure is closer to the lowest level of noise than it is to the loudest part of the swish sound.

The rules were written over 10 years ago when turbines were much smaller and the noise was different. The Government have resisted calls for a proper review of the noise rules; the only means of protecting people is to mount a court case. This is expensive and has no guarantee of success.  At the moment there are two cases pending. One in Lincolnshire where the Davies family have been driven from their home by excessive noise and another in Devon at Den Brook where they are seeking a noise condition which will put a limit on the permitted level of Amplitude modulation.

The Den Brook group have so far spent in excess of £70 thousand in various stages of fighting the wind farm proposal. The wind farm is now approved and the final step is to get a robust legal conditions which limit noise at homes around the site.  

Latest information from Mike Hulme  - Following my Court of Appeal (CoA) hearing 8th March, it is now clearer than ever just how important a robust Amplitude Modulation (AM) noise condition is in terms of our (neighbours) futures and that of wind farms. To put it into a nutshell, what I am attempting to ensure is a robust, standalone condition which considerably lowers the rating or baseline noise limits for whenever AM of 3dB or greater occurs.

While noise problems may not affect many properties, it is unfortunate that when problems do occur they are not predictable and they are rarely resolved.  

As more and more wind farms are built and ever larger turbines are proposed closer and closer to home the problem can only get worse. The problem needs to be addressed properly by the Government.

We hope that the cases being taken to court will highlight the problem and get some action taken. It is unfortunate that the burden is being carried by just a few people who, at random , have a wind turbine built too close to them.


We thank everybody who visited and who made generous donations, the money has now been sent to help the legal challenge being mounted by the Den Brook team.


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More information

Wind farm noise objection


Noise rules


Noise measurement tutorials


Den Brook appeal