They are safe for your hearing, and you can be exposed to these noise levels for an indefinite amount of time. Soft sounds, as the name suggests, are very mild and range from 20 to 40 dB. These levels are acceptable no matter how long you are exposed to them, and they are not considered potentially harmful to your hearing. Moderate noises are between 40 and 60 decibels. The most common examples of sounds in this range are: Nevertheless, they are still considered loud. Sounds ranging from 60 to 80 dB are not dangerous to human hearing.
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