Do you hear 50 decibels outside the door, what is the concept of 50 decibels

The possibility of 50 decibels of sound being heard outside the door is relatively large, because the door has an amplification effect, which will amplify the sound. However, whether it can be heard depends on the specific environment, the sound insulation effect of the door, the distance, and the type of sound.

If you want to be more precise about whether you can hear or not, you can imagine the following scenario:

1.Can 50 decibels of sound be heard indoors? If you can hear it indoors, it's more likely to be heard outside the door.

2.In a noisy environment, such as the side of the road, 50 dB may not be noticeable, but in a quieter environment, such as a residential area, 50 dB may be more noticeable.

3.If it is a high-frequency sound (such as a high-pitched whistle), even if the decibel number is low, it will travel far through the air and be easily heard.

4.In addition, if the sound is made closer to the door, it is more likely to be heard outside the door.

To sum up, whether a 50 decibel sound can be heard outside the door depends on a variety of factors and needs to be analyzed on a case-by-case basis.

Can't hear you. During the day, people normally speak forty to sixty decibels, and if you don't listen carefully, you generally can't hear them.

According to the average person's hearing, 0-20 decibels is very quiet, almost invisible. 20-40 decibels are quiet, like a whisper. 40-60 dB in general.

Ordinary indoor conversation at 60-70 decibels is noisy and nerve-damaging. 70-90 dB is noisy, nerve cells.

Damaged. 90-100 dB noise intensifies, hearing loss. 100-120 decibels is unbearable, and staying for a minute will temporarily cause deafness.

The decibel level is equivalent to the volume of ordinary conversation in the room. 10 decibels is about the sound that a person can just feel; When the sound is around 30 decibels, it will not affect normal life and rest; When the sound reaches 50 decibels or more, people generally feel more and have difficulty falling asleep.

2. Decibel is a unit of sound measurement. It is often used to indicate the strength of a sound. Each 10 dB increase is 10 times the intensity, 20 dB is 100 times, and 30 dB is 1,000 times.

The 55 decibel sound was transmitted to the next door. Because the sound reaches 55 decibels during the day and 45 decibels at night, it is considered a nuisance. According to the provisions of relevant national policies, the area around Kaixuan Road is a mixed area of residential, commercial and industrial areas, which is a second-class standard, which stipulates 60 decibels during the day and 50 decibels at night.

Once these two standards are exceeded, the relevant functional departments can impose penalties on the merchant.

20-40 decibels is about a whisper in the ear; 40-60 decibels belong to the normal conversation sound of people, 55 decibels is probably a louder communication, 55 decibels is equivalent to the sound of desktop computer host running 1 decibel: the sound that can be heard just 15 decibels: feel quiet 30 decibels:

The volume of the whisper is 40 decibels: the hum of the refrigerator.

Basic information about the sound.

Sound is produced by the vibration of an object, and the object that emits the sound is called the sound source. Sound is a wave phenomenon that is transmitted through a medium (air or solid, liquid) and can be perceived by the auditory organs of humans or animals. Sound is the motion formed by the propagation of sound waves through any substance.

Sound is a wave, and the sound with a frequency between 20 Hz and 20 kHz can be recognized by the human ear.

Generally, the sound of 50 decibels is similar to the sound of indoor chat, and now the thickness of load-bearing walls is generally about 24cm. If it is a non-load-bearing partition wall, the thickness is generally about 12cm, as long as the thickness does not exceed 30 cm, and the voice of the opposite side can be heard if you speak more than 30 decibels, and 30 40 decibels is a relatively quiet normal environment.

Anything above 50 decibels can affect sleep and rest. Due to insufficient rest, fatigue cannot be eliminated, and the physiological function of normal pants will be affected to a certain extent.

Usefulness of decibels:

Decibel (decibel,'dɛsɪ.b l ) is a unit of measurement that measures the proportion of two quantities in the same unit, mainly used to measure sound intensity, and is often expressed in db. The decibel is a non-SI unit selected by the state, and it is a gradation unit in China's legal unit of measurement.

Cent" (deci-) Zhenxiang refers to one-tenth, and the single digit is "bei" (bel), which is generally only used in decibels. The decibel is named after the American inventor Alexander Grahambell. <>

50 decibels is the sound of ordinary indoor conversation.

A decibel is a unit of sound measurement. It is often used to indicate the strength of a sound. Each 10 dB increase is 10 times the intensity, a 20 dB increase is 100 times, and a 30 dB increase is 1,000 times.

Common sound decibel tables are measured in decibels:

1. The rustle of leaves 10

2. Library Reading Room 30

3. Normal conversation 50 60

4. Busy shops 65

5. Large shopping malls 70

6. Noisy streets 80

7. Factory workshop 90

8. Chainsaw work 100 110

9. Aircraft engine engine 120

10. Rocket launch 140

The sound that the person just heard is 0 decibels, the sound that starts to feel noisy is 70 decibels, the sound that starts to destroy the cochlear cells is 105 decibels, the sound that starts to feel pain is 120 decibels, and the sound of 160 decibels can instantly pierce the eardrum.

Various noise decibel value tables.

Sound Noise level (a) affects people.

Rocket missile launches 150-160

Jet aircraft vents 130-140 are unbearable.

Propeller aircraft, anti-aircraft machine guns 120-130 hurt.

Diesel engine, ball mill 110-120

Looms, chainsaws 100-110

Trucks, noisy roads 90-100 are noisy.

Loud-talking, noisy neighborhoods 70-80 are noisy.

Generally speaking 60-70

Ordinary rooms 50-60 are quieter.

Quiet night 30-40

Whisper softly 20-30 quiet.

Anechoic (10-20 very quiet indoors.)

Lower limit of hearing) 0-10 Hearing (0) (1) In order to protect people's hearing and physical health, the allowable value of noise is 75 90 decibels.

2) To ensure conversation and communication, the allowable value of ambient noise is 45-60 decibels.

3) For sleep time is recommended at 35-50 decibels.

Interferes with sleep and causes tiredness.

The harm of noise to sleep: sudden noise at 40 decibels, can wake up 10 people, and when it reaches 60 decibels, it can wake up 70 people.

50 decibels is normal sound.