Japanese company invented intelligent noise reduction system to prevent mechanical construction disturbance
The noise from construction machinery is often miserable for nearby residents. A Japanese construction industry company has announced that it has developed a new intelligent noise reduction system that can effectively reduce the low frequency noise generated by construction machinery. Sound insulation walls or sound insulation boards are generally used to reduce noise in construction sites. However, due to the different ways of sound transmission at different frequencies, this only has a little effect on high frequency noise, and it has little effect on low frequency noise emitted by construction machinery. To reduce low frequency noise, you can artificially create a phase that is opposite in phase to the low frequency noise, thus canceling out the noise. However, since the number of engine revolutions varies with the construction machinery when performing different operations, the frequency of the low-frequency noise emitted by the construction machine changes accordingly. Therefore, how to randomly produce the "offset sound" matching the frequency of the low-frequency noise is a problem. The intelligent noise reduction system developed by the Japanese construction industry company Omura Group solves this problem. This system consists of a microphone that captures noise, a computer that generates "cancellation sound" based on the noise frequency, and a speaker that plays "offset sound". The computer stores a variety of low frequency noise frequency data, which can react quickly and play matching "offset sounds". This system can effectively reduce low frequency noise in actual tests. In the future, this technology will be applied to construction sites in urban areas. Low frequency noise refers to sounds with frequencies below 200 Hz, and high frequency noise refers to sounds with frequencies greater than 1000 Hz. The frequency of sound that can be heard by the average human ear is between 20 Hz and 20,000 Hz. Although the direct effects of low frequency noise on physiology are not as pronounced as high frequency noise, they have a longer-term effect on human health. Portable Citrus Juicer,Plastic Citrus Juicer,Lemon Juicer,Manual Orange Juicer,Citrus Squeezer,Grapefruit Juicer,Plastic Kitchen Citrus Juicer NINGBO CHENGTUO ELECTRIC APPLIANCE CO.,LTD , https://www.chengtuoappliance.com