How loud is the loudness decibels of the sound above and below for the human ear to hear? 15

According to the average person's sense of hearing, 0 2 0 decibels are very quiet, almost invisible.

2 0 4 0 dB is quiet, like a whisper.

4 0 6 0 dB average.

Ordinary indoor conversation 6 0 7 0 dB is noisy and nerve-damaging.

7 0 9 0 decibels are noisy and nerve cells are destroyed.

9 0 1 0 0 dB Loud and hearing impaired.

1 0 0 1 2 0 decibels are unbearable, and a minute of deafness is temporary.

Sound is audible to the human ear when it is above 20 Hz. Below 20,000 Hz, it can be heard by the human ear.

0db is a faint sound that can just be heard.

30-40db is ideal for a quiet environment.

70db can interfere with conversation and affect productivity.

Living in a noisy environment of 90db for a long time will seriously affect your hearing and cause neurasthenia, headache and high blood pressure.

If suddenly exposed to 150db of noise, the eardrum will rupture and bleed, and both ears will lose hearing completely.

To protect hearing, the sound should not exceed 90db

In order to guarantee work and study, the sound cannot exceed 70db

To ensure rest and sleep, the sound should not exceed 50db

0 dB is the smallest sound a person can hear.

Above 20,000 is ultrasound.

Below 20 is infrasound.

The normal decibel range of the ear is about zero to 20 decibels, and the normal range of the decibel value is our sensitivity to sound, if it is exceeded, it may cause some damage to the ear, so we must pay attention to avoid some noisy sounds in ordinary life, especially when setting off firecrackers or relatively loud whistles, which will cause damage to the eardrum.

(1) The loudness range of human hearing is: 0-150dB, but 150dB will produce the danger of hearing loss.

2) The frequency range of human hearing is: 20-20000Hz.

Additional knowledge: The faintest sound a person can just hear is 0 dB;

Ideally, a quiet environment is 30 40 dB;

70 dB of sound intensity that interferes with conversation and affects productivity;

Sound intensity of 90 dB or more that can be severely affected by hearing;

The sound intensity that can cause hearing loss in both ears is 150 dB.

To protect hearing, the sound should not exceed 90db

In order to guarantee work and study, the sound cannot exceed 70db

To ensure rest and sleep, the sound should not exceed 50db

Hearing loss greater than 25 decibels is deafness, and there are four levels: 25-40 mild, 41-60 moderate, 61-80 severe, and greater than 80 very severe. Hearing loss should be intervened in time, and the sooner you wear hearing aids, the better, as long as you have residual hearing, you can wear hearing aids. It is recommended to go to a professional fitting center for matching.

20-40 dB is about the whisper of Nan Nan for people. 40-60 dB of normal communication sound. More than 60 decibels, very loud sounds, more than 90 decibels, our hearing is impaired, so hearing at 25 decibels is within the normal hearing range.

The normal hearing range is below 25db, 41-60db is mild hearing loss, 61-80db is moderate hearing loss, 81-90db is severe hearing loss, and above 90db is very severe hearing loss. Generally, below 25 decibels is considered normal hearing. But you also have to have a resolution of 90 to 100 percent.

Normal hearing is the ability to hear sounds within 25 decibels in quiet conditions. If the sound is greater than 26 decibels, it is hearing loss. The general examination range is 250-800 Hz, in this range the sound can be heard within 25 decibels, can be regarded as normal, if it is 26-40 decibels, it is mild hearing loss, 41-55 dB is moderate hearing loss, 56-70 dB is moderate to severe hearing loss, 71-85 dB is severe hearing loss, more than 85 decibels, it is very severe hearing loss.

The threshold refers to the minimum audible frequency range, and the hearing frequency range of a normal person is 20Hz--20K Hz. Discernment refers to the ability to comprehend speech. In general, the longer the hearing loss, the more deterioration of hearing function and the worse the resolution of speech.

People with hearing impairments tend to have a smaller range of sound frequencies. The sound resolution is different for each frequency.

Decibel is a relatively small unit of sound, people generally can hear the smallest sound at 40 to 60 decibels, and the sound is particularly small.

It is a unit of measurement that measures the ratio of two quantities of the same unit, and is mainly used to measure the intensity of sound. The lowest decibel that our human ears can hear should be one decibel.

In fact, it is the unit of sound, and the minimum should be able to hear one decibel, and the size of this decibel is also related to the living environment.

The so-called hearing range does not refer to loudness, but refers to the tone, that is, the frequency of the vibration of the object, which is expressed in hertz (Hz), and 20Hz-20000Hz is the hearing range of a person.

The decibel is a division of sound intensity, and 0 decibel does not mean that there is no sound, but the faintest sound that people can usually hear, and the decibel of the sound can be heard if the decibel is high, but it will be harmful to the human body.

Hearing loss is calculated as pure tone audiometry and average hearing of air conductance in Hz. The hearing range of a normal person is between 0 25 decibels (dB).

According to the World Health Organization Grading Standards for Deafness:

26 40 dB; Mild deafness.

41 55 dB: Moderately deaf.

56 70 dB: moderate to severe deafness.

71 90 dB: Severely deaf.

Volume analogy.

130 dB Jet take-off sound.

110 dB Spiral Aircraft Take-off Sound.

105 dB Permanent impairment of hearing.

100 dB pneumatic rig sound.

90 dB Noisy bar ambient sound.

85 dB and below will not destroy the hair cells in the cochlea.

80 dB noisy office.

75 dB upper limit of human ear comfort.

70 dB street ambient sound.

50 dB normal conversation sound.

20 dB whispering.

According to the ordinary person's sense of hearing.

0 2 0 dB It's so quiet that it's almost invisible;

2 0 4 0 dB is quiet, like a whisper.

4 0 6 0 dB average. Ordinary indoor conversation;

6 0 7 0 dB noisy, nerve-damaging;

7 0 9 0 decibels are noisy and nerve cells are destroyed.

9 0 1 0 0 dB Loud and hearing impaired.

1 0 0 1 2 0 decibels are unbearable, and a minute of deafness is temporary.

Above 120 decibels: extremely deaf or totally deaf.

In daily life, under normal circumstances, how many decibels of sound are almost worn by our human ears, and we can't feel blind?

The answer is: 20 decibels.

People are more accustomed to sound intensity: no more than 70 decibels.

Additional knowledge: The faintest sound a person can just hear is 0 dB;

Ideally, a quiet environment is 30 40 dB;

70 dB of sound intensity that interferes with conversation and affects productivity;

Sound intensity of 90 dB or more that can be severely affected by hearing;

The sound intensity that can cause hearing loss in both ears is 150 dB.

To protect hearing, the sound should not exceed 90db

In order to guarantee work and study, the sound cannot exceed 70db

To ensure rest and sleep, the sound should not exceed 50db

Summary. Hello, 80 decibels.

If the volume heard at a distance of 10 meters from the sound source is 100 decibels, what is the volume heard at a distance of 100 meters from the sound source?

Hello, 80 decibels.

The calculation formula is: 100-20log100 10=80db It is easier to reduce from 100 dB to 80 dB when noise control, and it is difficult to reduce from 70 dB to 50 dB.

The amplitude of the sound is small, for example, the net port is so big, such a small thing will definitely run away, and only a big thing can get the net.

The audible sound frequency range for humans is: 20Hz 20kHz.

For small sounds, as long as the loudness increases slightly, the human ear can feel it, but when the loudness of the sound increases to a certain value, even if there is a large increase, the human ear perception has no obvious change. We refer to this aural property of the human ear as a "logarithmic" property of sound loudness. In addition, the human ear has different auditory loudness for sounds of different frequencies.

The hearing range of the human can be divided into 3 parts according to the octave relationship, and the low, medium and high frequency segments can be determined

1. Bass segment: 20Hz 160Hz (3 octave);

2. Intermediate audio segment: 160Hz 2500Hz (4 octave);

3. Treble segment: 2500Hz 20000Hz (3 octave).