The invention discloses a self-adaption
noise reduction device for
low frequency noise in an indoor environment. The self-adaption
noise reduction device for
low frequency noise in the indoor environment comprises a primary
microphone, an inverse sound source, a frequency adjusting device and a secondary
microphone. The secondary
microphone is a high-sensitivity omnidirectional
electret secondary microphone with the
response frequency ranging from 20Hz to 20KHz. The primary microphone and the secondary microphone are connected through an audio cable and a 16-bit analog-to-
digital converter respectively. The 16-bit analog-to-
digital converter is connected with an I / O read-write parallel interface of the frequency adjusting device through a 16-pin parallel interface
bus. The reverse sound source is connected with an MCU processor of the frequency adjusting device through a serial analog-to-
digital converter. The self-adaption
noise reduction device for
low frequency noise in the indoor environment is particularly suitable for low
frequency noise processing in a household environment, low
frequency noise emitted by indoor electronic devices and
electrical devices can be obviously reduced, the
living environment is improved, and the living quality is improved. The self-adaption
noise reduction device for low
frequency noise in the indoor environment is small in size, capable of being used once a
system is powered, free of a complex installation process, low in manufacturing cost and capable of being completely purchased and deployed by general users.