Noise Restricted Operation In certain locations, legal regulations may require turbine noise emissions to be below a certain decibel limit, depending on: the day of the week the time of day dB the wind speed and direction Stopping the wind turbine in order to comply with local acoustic emission regulations is not optimal for production. This is why Siemens developed Noise Restricted Operation At noise sensitive sites, the functionality allows turbines to switch from normal operation to noise restricted operation as necessary. avoiding complete shutdown of the wind turbine complying with local regulations curtailing noise emissions Thereby optimizing the maximum power output to noise emission ­trade-off for greater harmony between the wind park and the surrounding communities. www.siemens.com/wind © Siemens AG, 2015