What is a Decibel?

Decibel (decibel) is a unit of measurement for measuring the proportion of two identical units. It is mainly used to measure the sound intensity. It is often expressed in dB.

Decibel is the more commonly used unit of measurement. Can be expressed as:

1, a unit representing the ratio of power, which is commonly used to equal the ratio of power intensity

1 dB	Just heard
15 decibels or less	Feel quiet
30 dB	Whisper volume
40 dB	Buzz of the refrigerator
60 dB	Normal conversation voice
70 dB	Equivalent to walking in the downtown area
85 dB	Cars shuttle on the road
95 dB	Motorcycle start sound
100 dB	Decoration electric drill sound
110 dB	Karaoke, play MP3 loudly
120 dB	The sound of the plane taking off
150 dB	The sound of fireworks

American Speech and Hearing Association reminds: Long-term reception of 50 decibels of noise at night can easily lead to cardiovascular disease; 55 decibels will have a negative impact on children's learning; 60 decibels make people wake up from their sleep; 70 decibels, the onset of myocardial infarction The rate increases by about 30%; exceeding 110 dB may cause permanent hearing loss ^[2] .