The partition wall is obviously listening to the sound of the upstairs, but it is downstairs

The reason why I heard the sound of the upper floor was heard by the partition wall, but the reason why it was downstairs may be:

1.The sound you hear isn't actually coming from upstairs, it's coming from downstairs or further down the block. Because the speed of sound propagation in the air is not the same as the propagation speed in steel pipes and walls, and the energy loss of propagation is also different, this difference causes the noise downstairs to sound like it is coming from the heating pipes, and the arrangement of the pipes in your home will make the sound you hear deviate from the direction of the real sound source.

2.The sound you hear comes from the upstairs neighbor's house, and the neighbor's house comes to your ears through the floor, so you mistake it for the sound from upstairs.

The above is the possible reason why you listen to the sound upstairs but downstairs, I hope it will help you.

Obviously, the building you are in has thin floors for physical reasons. Sound travels through different substances, and the sound waves gradually weaken.

The reason why you can hear the noise upstairs is that most of the sound from the upstairs can be heard to be transmitted downstairs, and it will pass through the air upstairs Floor Indoor air downstairs The sound waves will gradually weaken to the ears of people.

In the same way, the sound coming from downstairs is transmitted to the upstairs through the floor slab, and it will pass through the indoor air downstairs Floor slab Upstairs indoor air Human ears.

It may not be from upstairs, but the sound propagation problem, especially when people are quiet, the sound of other units will make you mistakenly think that it is upstairs.

The sound from downstairs will be transmitted upstairs because the noise is generally transmitted to the upload.

Sound travels through different substances, and the sound waves gradually weaken. The reason why you can hear the noise upstairs is that most of the sound made by the upstairs when it hits the ground floor, the sound is transmitted directly to the downstairs through the floor, so it can be heard very clearly, but if the sound is not made from the ground, such as the sound of speaking to the downstairs, it will pass through the air upstairs Floor floor Indoor air downstairs Human ears, the sound wave will gradually weaken.

In the same way, the sound coming from downstairs is transmitted to the upstairs through the floor slab, and it will pass through the indoor air downstairs Floor slab Upstairs indoor air Human ears.

It's easier to hear upstairs downstairs.

Analysis, we first have to look at the daily life of a large number of shouting sound from what position, life our noise is usually ** in the mouth and hands of people, that is, at a height of 1-2 meters from the ground, these sounds are emitted, through the window or floor to the ears of the listeners, we can calculate, usually the current building floor height is about 3 meters, then the sound downstairs to the upstairs into the distance is the height of the floor - the height of the sound source + the height of the human ear. And the distance from the sound upstairs to the downstairs is the height of the sound source + the height of the floor - the height of the human ear. Because the height of the human ear is obviously greater than the height of the sound source, it can be clearly seen that the distance from the downstairs to the upstairs is smaller than that of the upstairs infiltration and delivery downstairs.

What we usually feel in life is that it's easier to hear upstairs downstairs, why is that?In fact, the reason is very simple, our buildings now have sound insulation indicators, that is to say, most of the noise generated by our normal daily life can be absorbed and isolated by the building itself, only the particularly loud sound and the sound of direct knocking on the building are easy to spread out and be heard by neighbors, what is the reason for the particularly loud sound and the sound of directly knocking on the building in our lives?"Phew!

Either move furniture or smash things. Then the height of this sound source is on the floor, which is equal to 0, and the distance of the sound to the downstairs is much smaller than that upstairs.

The sound is circuitous, and the sound from downstairs can be transmitted upstairs through cracks such as windows. We shout in front of the building, and the people in the back of the building can also hear the shouting, and this is the roundabout nature of the sound.

The same decibel sound can be heard differently in different environments.

The human ear has an automatic volume adjustment function, the hearing decreases as the sound becomes louder, the energy of the sound doubles, and the feeling we hear is only 30% louder, which is why the volume is expressed in decibels, and the decibel value is close to the rate of change in the loudness of the sound heard by the person.

When the ambient noise is large, the sound we hear will be smaller, so the volume when we watch TV during the day is always louder than late at night, because the outside noise is louder during the day.

You can hear a pin drop on the ground in the dead of night, but you may not hear it during the day.

In addition, there are factors such as resonance, reflection, and absorption of the surrounding environment. For example, the people downstairs standing on the grass and standing on the concrete floor are not the same as talking and destroying, and the size of what they hear upstairs is very different.

The people speaking upstairs are reflected and absorbed in different directions by the structure of the room and the different furniture in the room, and the sound energy that can actually be transmitted downstairs is very small, and the sound will become confused and blurred.

The people downstairs speak through the reflection of the ground, and the energy transmitted to the room is partially increased.

In addition, the noise outdoors is generally louder than that indoors. So people who are outdoors have a little weaker hearing sensitivity than people who are indoors.

So in most cases, people upstairs can hear people downstairs, but people downstairs can't hear or can't hear people upstairs.

But if you are talking in a room, it may also be due to resonance and other reasons, and you can do it downstairs.