How loud is 30 decibels? How loud is 3 decibels

Below 30 decibels is a very quiet environment, such as broadcast studios, hospitals, etc. 40 dB is normal for an environment, such as the average office should be maintained at this level. 50-60 dB is a noisy environment, when mental work is affected and conversation is disturbed.

Volume analogy. 120 decibels: civil airliner takes off.

110 dB: Bus engine.

100 dB: Factory floor.

90 dB: Square Dance.

70 decibels: large shopping malls.

40 dB: Library.

20 dB: The park of Jingyuan.

The noise should be less than 70 decibels during the day and 60 decibels at night, and the volume should not exceed 120 decibels to protect hearing.

One decibel is about the sound of a leaf falling on the ground, and the decibel has a concept, and people can't hear it at all.

You can't hear it in a quiet room.

30 dB is equivalent to the volume of a whisper, and the other volume decibel tables are as follows:

Decibels: Sounds that can just be heard.

Below decibels: Feels quiet.

Decibels: The volume of the whisper.

Decibels: The hum of the refrigerator.

Decibels: The sound of normal conversation.

Decibels: equivalent to walking in the downtown area.

Decibels: cars on the road.

Decibels: The sound of the motorcycle starting.

Decibels: The sound of a decoration drill.

Decibels: The sound of an airplane taking off.

Decibels: The sound of fireworks being set off.

The American Speech-Hearing Association reminds that long-term exposure to 50 decibels of noise at night can easily lead to cardiovascular disease; 55 decibels, which can have a negative impact on children's learning; 60 decibels, wake people up from sleep; 70 decibels, the incidence of myocardial infarction increases by about 30%; Exceeding 110 dB can lead to permanent hearing damage.

The volume of 30 decibels is about the sound of a person speaking softly.

The sound of 30 decibels does not affect people's rest, it is a relatively small sound, which can create a relatively quiet environment.

55 decibels, which can have a negative impact on children's learning; 60 decibels, wake people up from sleep; 70 decibels, myocardial infarction.

increased incidence by about 30%; Exceeding 110 dB can lead to permanent hearing damage.

It is often divided according to the hearing of normal people:

Between 0 and 20 decibels, you can hardly feel the sound outside.

Between 20-40 decibels, it is like a whisper.

40-60 dB is generally an ordinary indoor conversation.

60-70 decibels is like a quarrel, which is nerve-damaging.

70-90 decibels is a loud shout, if you live under such a sound for a long time, it will affect nerve cells.

Damaged. 90-100 decibels is unacceptable and can cause serious hearing damage.

The volume of the decibel sound is about the sound of a person speaking softly. The sound of 30 decibels does not affect people's rest, it is a relatively small sound, which is considered a relatively quiet environment.

2. Generally speaking, the decibel value starts from 1, 1 decibel is just enough to hear the sound, below 20 decibels are very quiet, 20-40 decibels are quieter, that is, whispering.

30 decibels is equivalent to the volume of the ear.

1 dB: just audible sound; Below 15 decibels: feel quiet ; 30 decibels: The volume of the whisper.

40 decibels: the hum of the refrigerator; 60 dB : the sound of normal conversation; 70 decibels: equivalent to walking in the downtown area.

85 decibels: cars on the road; 95 dB: Motorcycle start forest bureau sound; 100 decibels: the sound of a decorative drill.

150 decibels: The sound of fireworks.

30 decibels is a whisper, which is a relatively small sound that can be heard in quieter conditions.

The sound of 40 decibels belongs to the sound of our soft speech. A decibel is a unit of sound pressure level, denoted as dB, and is used to represent the unit of measurement (magnitude of sound) of sound. The sound that the human ear can hear just now is 0-10 decibels.

Every 10-point increase in the decibel level indicates a 10-fold increase in volume.

A reference to the size of the decibel range.

0-20 dB: It's quiet, barely felt.

20-40 decibels: is the whisper in the ear.

40-60 decibels: This is a normal conversational sound.

More than 60 decibels: It is in the noisy range.

Above 70 decibels: begins to damage the hearing nerve.

Above 90 decibels: hearing loss.

100-120 dB: Temporary deafness (deafness) for one minute.

30 dB is equivalent to the volume of a whisper, and the other volume decibel tables are as follows:

Decibels: Sounds that can just be heard.

Below decibels: Feels quiet.

Decibels: The amount of muffled response to the whisper.

Decibels: The hum of the refrigerator.

Decibels: The sound of normal conversation.

Decibels: equivalent to walking in the downtown area.

Decibels: cars on the road.

Decibels: The sound of the motorcycle starting.

Decibels: The sound of a decoration drill.

Decibels: The sound of an airplane taking off.

Decibels: The sound of fireworks is like the sound of wisdom.

The American Speech-Hearing Association reminds that long-term exposure to 50 decibels of noise at night can easily lead to cardiovascular disease; 55 decibels, which can have a negative impact on children's learning; 60 decibels, wake people up from sleep; 70 decibels, the incidence of myocardial infarction increases by about 30%; Exceeding 110 dB can lead to permanent hearing damage.