What is the concept of 45 dB sound?

The sound of 45 decibels is probably the sound of us speaking softly.

PS: The approximate meaning of decibels:

10 decibels is the sound that the human ear can just hear, and it is very subtle.

10-20 dB sound, generally speaking, we think it is quiet, of course, generally speaking, below 15 decibels, we can consider it to be dead silent.

The sound of 20-40 decibels is probably the whisper in the ears of a couple.

The sound of 40-60 decibels belongs to our normal conversational sounds.

Sounds above 60 decibels are in the noisy range.

At 70 decibels we can consider it very noisy and start to damage the hearing nerve.

Sound above 90 decibels can cause hearing damage.

Decibel. is a unit of measurement of sound intensity.

45 decibels, relatively quiet feeling.

Described in the junior high school textbook:

30 dB, bedroom.

40 dB, book reading room.

50 dB, office.

60 decibels, general speaking.

45 decibels is halfway between the reading room and the office, equivalent to the hum of a refrigerator.

A 45 dB sound is a relatively light sound that can often be described as a "slight hum", "faint conversation", or "idle computer noise". In a quiet indoor environment, a sound of 45 decibels is roughly equivalent to the hum of a refrigerator.

"Decibel" is a unit of measurement for the intensity of sound. The strength of 45 decibels is relatively low and will not cause damage to the human body. FYI.

45 decibels. Between 40 and 60 decibels, it is a normal conversation sound. When the regional environmental noise of the community reaches the noise environmental quality class 1 standard, it is suitable for human habitation, that is, it is lower than 55 decibels during the day and 45 decibels at night, so 45 decibels is a relatively quiet sound.

The unit of sound is decibels, when the sound is loud to a certain decibels, it becomes noise, noise in life is very harmful, it will cause people to be irritable, and it will endanger people's health when it is serious.

According to normal human hearing:

0-20 dB, very quiet, almost invisible;

20-40 decibels, quiet, like a whisper;

40-60 dB, normal, normal indoor conversation;

60-70 decibels, noisy, nerve-damaging;

70-90 decibels, very noisy, nerve cells.

be sabotaged; 90-100 decibels, increased noise, hearing loss;

100-120 decibels, unbearable, staying for a minute can temporarily cause deafness;

Above 120 decibels: extremely deaf or totally deaf.

Decibel. It is equivalent to the sound of a desktop computer running on the main computer.

Generally speaking, 20-40 decibels is about a whisper in the ear; 40-60 decibels is a normal conversation sound; More than 60 decibels is in the noisy range; 70 decibels can be considered noisy and begin to damage the hearing nerve; Above 90 decibels can cause hearing damage.

** of the decibel concept.

In acoustics, it is customary to use decibels to indicate the loudness of sound.

The so-called loudness and sound pressure of the sound.

related, that is, the pressure difference of the sound waves, in Pascal.

The sound pressure that can be felt by the human ear is not more than 20,000 Pa, and the lowest sound pressure that can be felt is about Pa, which is very inconvenient to describe in daily life, so the concept of decibels was introduced.

The so-called Bell value of sound pressure is the logarithm of sound pressure.

Multiply by 2 later. In daily life, in fact, we rarely encounter the so-called limit sound pressure, and the number of bells in the general environment is about 8-13. If the bell is used to represent the magnitude of the sound is still very coarse, so the scientists.

Decibel numbers were introduced. Scientists divided each bel interval into 10 parts, each representing a different intensity and sound pressure, or decibels.

55 decibels is equivalent to the sound of a desktop computer running on the host.

When the sound exceeds 50 decibels, the average person will feel uncomfortable, 75 decibels is already the upper limit of human ear comfort, long-term exposure to 80 decibels, will cause damage to the ear.

The American Chinese Hearing Association also reminds that long-term exposure to 50 decibels of sound at night can easily lead to cardiovascular disease.

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

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

Noise prevention measures:

The main measures to prevent noise are that if you work in a noisy environment, you should wear noise-reducing earplugs and headsets for a long time, so as to prevent the ears from receiving more noise and causing noise deafness.

In daily life, try to avoid going to particularly noisy environments, such as song halls and discotheques. To this kind of place, one should reduce the time, and the other should be far away from the speaker. Because the super sound will have a cochlea in the inner ear.

Hair cells cause damage, which is often irreversible after the formation of damage, causing sensorineural hearing loss, accompanied by tinnitus.

In severe cases, headaches can also occur.

Dizziness and other symptoms, so prevention is usually the main thing.