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    About the website.....

    The site is the product of an ongoing project to understand wind turbine sound in our environment; born from a conversation with an Environmental Health Officer, and the inadequacy of words to describe the sound of a wind turbine. The site investigates the use of  spectrograms  and turbine 'noise'  to enable  you to see what you are listening to.


    The site does not attempt to explain the science of acoustics. The site does not discuss the merits of wind turbines and their contribution to green energy nor does it detail the debates surrounding them: the site has no opinion on appropriate  development . The site though is specific to wind turbines and their negative contribution to environmental noise in Ceredigion, Wales..


    The aim is to help you understand what you are hearing when the wind turbine noise becomes a problem.

    Spectrograms and seeing turbine sound



    Woosh, swish, thwack, yee yaw, churn…if you live next to a wind turbine you will notice the distinctive noises they make but can you ever describe it? These comic book words do but are inapprpriate to describe a very real noise. When the sound of a turbine becomes an annoyance and the noise becomes nuisance, comic book descriptions to describe unwanted sounds are inadequate. Trying to describe to the Environmental Health Officer why a neighbours' turbine was causing us trouble, talking of the woosh, the weesh and the twack of it reduced what is a very real problem to the absurd.


    Speech therapists use spectrograms as a tool to show how we form words, while record industry producers  use spectrograms when mastering sound recordings to understand what happens when  sound frequencies combine. Every spoken word, instrument, machine or a neighbours wind turbine will produce specific sound frequencies that create an acoustic signature.  Wikipedia describes a spectrogram as “a visual representation of the spectrum of frequencies in a sound or other signal as they vary with time or some other variable.”
    Put a simpler way a spectrogram is a picture of what we hear: "a sound image"




    An example - Endurance E3120
     The spectrograms illustrated on this site are specific to one type of wind turbine - The Endurance E-3120 Wind Turbine. By taking over 100 hours of recordings and producing spectrograms of the results the noise of the turbine can be seen: - the  E3120 turbine produces recognisable tonal sound at three frequency bands. This is verified by the E3120 acoustic performance test report (HM: 2300/R1 6th April 2011) published by Hayes Mckenzie Partnership which investigates the narrow band spectra characteristics of the turbine. Tonal assessment  studies by Hayes Mckenzie Partnership identifies tones for an Endurance E3120 wind turbine at 287.2 Hz, 955.2Hz & 2307.8Hz for wind speeds of 6m/s. Our spectrogram images not only confirm this  but indicate that these tones are audible at many other wind speeds and weather conditions. If you have similar experiences and would like to make similar recordings/images read on..............


    " Spectrograms show what we hear when words are not enough.....pages of description,  hours of recordings are revealed in a glimpse"