  While our world is filled with its own natural sounds that we can't resist
enjoying, it is also chock-full of other sounds that can be irritating, this is
noise. Noise not only influences the working efficiency but also the human's
health. The problem of reducing noise is one of great importance and great
difficulty. The problem has been addressed in many ways over the years. The
current methods for noise reducing mostly rely on the materials and
transmission medium, which are only effective to some extent for the high
frequency noise. However, the effective reduction noise method especially for
low frequency noise is very limited.
  Here we come up with a noise reduction system consist of a sensor to detect
the noise in the environment. Then the noise will be sent to an electronic
control system to process the noise, which will generate a reverse phase
frequency signal to counteract the disturbance. Finally, the processed smaller
noise will be broadcasted by the speaker. Through this smart noise reduction
system, even the noise with low-frequency can be eliminated.
  The system is also integrated with sleep tracking and music player
applications. It can also remember and store settings for the same environment,
sense temperature, and smart control of home furniture, fire alarm, etc. This
smart system can transfer data easily by Wi-Fi or Bluetooth and controlled by
its APP.
  In this project, we will present a model of the above technology which can be
used in various environments to prevent noise pollution and provide a solution
to the people who have difficulties finding a peaceful and quiet environment
for sleep, work or study.
