White noise machines typically produce sound at a level of around 50 to 60 decibels (dB). This is comparable to the sound of a normal conversation or the background noise in a busy office. Some white noise machines may produce sound at a higher or lower level, so it's important to check the decibel level of the machine before purchasing it.
It's worth noting that the perceived loudness of sound is subjective and can vary depending on individual hearing sensitivity and environmental factors. Additionally, the effectiveness of white noise in blocking out unwanted sounds may also vary depending on the individual and the specific sounds they are trying to block.
