The invention discloses a wind
turbine generator
noise masking device based on the
noise control technique. The wind
turbine generator
noise masking device comprises a pre-collection unit, a storage unit, a
signal collection unit, a
processing unit and a sound playing unit. The invention further discloses a wind
turbine generator
noise masking method based on the
noise control technique. The wind turbine generator
noise masking method based on the
noise control technique comprises the following steps that the pre-collection unit collects natural wind sound samples and wind turbine generator noise samples in resident residences and manufactures narrow-band sound samples with different
sound pressure levels and different frequency bands, and the narrow-band sound samples are stored into the storage unit; the
signal collection unit records the parameters of
wind speed,
air humidity, blade positions and the like during operation of the wind turbine generator, and therefore the
noise spectrum data of the wind turbine generator are obtained; the
processing unit enables the
noise spectrum of the wind turbine generator to be compared with natural wind sound spectrum, and the
frequency spectrum of sound samples which need to be superposed is calculated; sound samples which need to be superposed are composed by the
processing unit with the utilization of the narrow-band sound samples according to the
frequency spectrum of the sound samples which need to be superposed, the sound samples which need to be superposed are played through the sound playing unit, and therefore the noise, heard in the resident residences, of the wind turbine generator is made to be similar to wind sound.