Normally, with 6-fold noise reduction technology, our control box is almost silent, up to 28 dB. However, since the pillow is equipped with flexible airbags, when you sleep on the pillow, bone conduction will amplify the sound of the airbag inflation. If you are very sensitive to this sound, we suggest you adjusting the intervention strength of the anti-snore pillow to Weak Level throught the button on the control box or the Nitetronic App to make it more suitable for you.