I always hear all kinds of sounds when I sleep at night, why do I hear a knock on the door when I sl

It may be that there is a problem with the ears, or you listen carefully to the sound coming from. In the dead of night, some movements are heard.

In this case, you must first distinguish clearly, the sound comes from**! Or tinnitus!

When you hear a knock on the door when you sleep at night, and it is not an illusion, it must be a malicious interference, it is recommended that you check the sound**, or check whether it is human through the cat's eye, and at the same time give feedback to the property.

Further reading: Effects of noise pollution on human health:

A noise level of 30 to 40 dB is a relatively quiet normal environment; Anything above 50 decibels can affect sleep and rest.

Due to insufficient rest, fatigue cannot be eliminated, and normal physiological functions will be affected to a certain extent; More than 70 decibels interfere with conversation, causing upset, lack of concentration, affecting work efficiency, and even accidents; Long-term work or living in a noise environment above 90 decibels can seriously affect hearing and lead to the occurrence of other diseases. Hearing loss can be acute and chronic. Exposure to strong noise, tinnitus, hearing loss, as long as it is not long, once out of the noise environment, it can quickly return to normal, called auditory adaptation.

If you are exposed to strong noise for a long time and your hearing loss is obvious, it will take a few hours, or even a dozen to twenty hours, to return to normal after leaving the noisy environment, which is called auditory fatigue.

This temporary hearing loss is still physiological, but it can develop into noise-induced hearing loss. If you continue to be exposed to strong noise, the auditory fatigue cannot be recovered, and the hearing continues to decline, which will cause noise-induced hearing loss, which will become a pathological change.

This symptom manifests in the early stages as hearing loss at high levels. However, at this stage, the patient subjectively does not have abnormal sensation, and there is no effect on speech and hearing, which is called hearing loss. If the disease progresses further, the hearing curve will continue to decline, and when the average hearing loss exceeds 25 decibels, there will be speech hearing abnormalities, and subjective sensory speech difficulties, which is called noise deafness.

In addition, powerful sound bursts, such as ** and gunshots, can cause acute violent deafness, resulting in ruptured eardrums, misalignment of the small ossicular bones of the middle ear, ligament tears, hemorrhage, and partial or complete loss of hearing.

Subjective symptoms include earache, dizziness, headache, nausea and vomiting.

This is likely to be an over-engrossed state of mind on the Internet, which makes the brain unconsciously in a state of tension and produces a light sleep response, commonly known as hallucinations.

Hello, it is a pleasure to serve you and give you the following answer: At night, you hear a call that may be the sound of an animal or a person. If it's an animal, it could be a cat, dog, or other domestic animal.

If it's a human cry, it may be someone celebrating or angry. Workaround:1

If it's an animal meow, check to see if there are missing pets around, and if so, try to catch them and provide them with a safe environment. 2.If it's a human voice, try to see if anyone is hurting or celebrating, and if so, try to help them or participate in their filial piety celebration.

Personal Tips:1If it's an animal's call, try to catch them and give them a safe environment to avoid harm.

2.If it's a human voice, try to help them or participate in their celebrations to strengthen your friendship.

This phenomenon is usually caused by polyps in the respiratory tract, polyps narrow the respiratory tract, and this phenomenon occurs when breathing is not smooth, so if you want to solve the problem completely, go to the hospital to cut off the polyps, or change the dormitory. The following friends and other netizens explained more professionally, it may be that the difficulty is sleep apnea syndrome. (sas)

SAS is defined as apnea that reverses more than 30 times or apnea-hypopnea index (AHI) greater than or equal to 5 hours per night during 7 hours of sleep.

According to the cause and mechanism, it can be divided into central sleep apnea syndrome (CSAS) and obstructive sleep apnea syndrome (OSAHS).Among them, OSAHS accounts for the majority, and most of them have pathological basis of upper breathing, especially nasal and pharyngeal stenosis, such as obesity, nasal polyps, tonsil hypertrophy, soft palate relaxation, uvula too long and thick, tongue hypertrophy, tongue base fall, mandibular recession, temporomandibular joint dysfunction, etc., and some endocrine diseases such as hypothyroidism, acromegaly and osahs

The clinical manifestations are drowsiness, dizziness and fatigue, mental and behavioral abnormalities, morning headaches, personality changes, and decreased sexual function during the day. At night, it may manifest as snoring, apnea, awakening, restlessness, hyperhidrosis, enuresis, and abnormal sleep behavior.

Often! Someone did a survey on the Internet and found that 80 people had heard it, and each time it was 2 or 3 sounds like a marble ball falling to the ground and bouncing again. And it's all heard in the middle of the night, and the sound seems to be quite heavy, do children still play marbles now?

And sometimes you can hear the sound of mahjong dice falling to the ground! What is the reason for this? Is it hot expansion and cold contraction?

Experiment: I really went upstairs to play marbles, and found that the sound was almost inaudible, in fact, the floor was much thicker than most people imagined, at most like stationery, watches and other sounds falling to the ground, if this can be heard, then I can see it, you can hear every move upstairs. Experiments have proved that whether the sound can reach the downstairs has a lot to do with the weight of the thing, maybe there are acoustic or physical reasons for this, but it is not ** here, in short, even if the marbles are deliberately smashed on the ground with great force, it is necessary to listen carefully in the dead of night to hear some (and the type of sound is not like that).

It turns out that the culprit is mold! It is an incomplete fungus that mainly corrodes industrial materials and cement, and is better to grow on porous surfaces and feed on minerals in cement. Generally, the ceiling is supported by two layers of fine steel bars, in fact, the steel bars are not straight when grouting, and the flow and weight of the cement slurry may have upward or left and right stress accumulation, or the house is built for several years by the ** or small displacement of the foundation and other factors, and the fine steel bar will produce new stress.

In the lower layer of the ceiling, there is a pipe outlet of the electric light line, there is temperature and air, etc., so the mold will gradually invade the cement along the hole, and the contact surface between the fine steel bar and the cement is the ideal seam, and the mold will accumulate here, and the mycelium will begin to erode into a hollow pipe around it. When the surrounding cement of a stressed steel bar is eroded to a certain extent, it will bounce back and forth in the hollow pipe, which is the sound of marbles. Therefore, the next step of the experiment is to deliberately make cement blocks; A plastic rod slightly thicker than the steel bar is sandwiched in the middle to form a hollow channel, and after the cement is half dry, the plastic pipe is taken out and inserted into the steel bar, and then some cement is poured from the other end to fix it.

It turns out that the sound of thin steel bars bouncing in the pipe is the most similar to the sound of marbles. This explains the following points1The source of the sound is either inside the wall or outside the wall, considering that many people are not inhabited upstairs at all, and all of them are similar to the sound of marbles; The source of sound must be inside the wall, and the things inside the wall are cement, water pipes, steel bars, and wires, and the cold shrinkage of the hot tent has been eliminated, so this is the only logical explanation.

2.Since it mostly occurs in the steel mesh below, it is heard from the ceiling, and the upstairs should be heard from the ground may be close to the floor at that time, which is much less likely, because it has been proved that the sound insulation effect of thick cement is stronger than imagined, and it is even more difficult to hear if there is a large furniture just above, and few people will stick things on the ceiling, but the floor is often pasted with tiles or wood to block the sound conduction. Maybe someone was lucky enough to hear it when they slept on the floor.

3.This explains why almost no one has ever heard of marbles coming from the walls, because the partition walls are mostly brick walls with no steel at all, so the chances are much less, if any; When you hear something, you think it's nailing something next door.

Hearing mom and dad bark all the time at night can be due to the fact that they are doing some intimate act, such as sex or flirting. This sound is usually a normal physiological response and there is no need to worry too much.

If you feel that this sound is affecting your sleep or quality of life, consider taking the following steps:

1.Communicate with your parents: Communicate openly with your parents, tell them about the impact of this voice on you, and ask them to reduce or avoid this behavior at night.

3.Use earplugs: Use comfortable earplugs to reduce noise distractions and help you sleep better.

Please note that family relationships are very personal and sensitive topics, so it is best to have adequate communication and understanding with your family before making any decisions.

When you hear someone calling, it will be better for you to close the door.