Can I hear the sound inside the house from outside?

Because the sound waves that are spoken in the house are conducted around the wall, because the sound waves are conducted opposite to the opposite side of the wall, they will cancel out or partially cancel out the sound waves in the wall, so that most of the sound waves conducted through the wall are canceled out, so the indoor sound cannot be heard outdoors. Speaking outside, only one direction of sound waves is conducted through the wall, and there is no sound wave in the opposite direction inside the wall, so there is no cancellation phenomenon in the wall, so you can hear the outside in the house.

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Under normal circumstances, if the room is well insulated and there is no resonance, then the sound inside the house is generally not heard from outside. However, there are some special circumstances that may result in being able to hear the sound inside the house outside:

1.Resonance in the room: Resonance may occur when there are objects in the room (such as furniture, decorations, etc.) that are similar to the vibration frequency of the outside world. In this case, the outside world can hear the sound in the room.

2.The window or door is not fully closed: If the window or door is not completely closed, then the outside world may hear the sound in the room through the air movement.

3.Outside Hearing Interior Sounds Through Acoustic Mediums: In some cases, outside outside areas may hear sounds inside the room through acoustic mediums such as reinforced concrete walls, plasterboard, etc.

It is important to note that a well-soundproofed house is often effective in preventing the outside world from hearing the sounds inside the room. However, to ensure privacy and sound safety, it is advisable to ensure that the room is well soundproofed in any case, and to take care of measures such as closing doors and windows.

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There are two factors to consider.

1. The intensity of the sound. If it's a mosquito buzzing, I'm responsible to tell you that it can't be heard outside.

Second, the sound insulation effect of the room. Ordinary houses have a certain amount of sound insulation ability, and ordinary whispers cannot be heard by outsiders. If there is a family meeting, the neighbors should be able to hear it.

Summary. Dear, hello, the content of my service for you here is to speak in the room, the sound of speaking is transmitted to the wall and reflected back, the time difference is too short, we can't distinguish the echo from the original sound, what we hear is a mixture of echo and original sound, so the sound we hear is very loud and loud; When we talk in the open field, the sound travels, there are no tall buildings around, the sound cannot be reflected back, we only hear the original sound, so it does not sound as loud as the room.

Dear, hello, my relatives here for you to serve the content is to speak in the room, the sound of the voice to the wall and reflected back, the time difference is too short, we can not distinguish the echo and the original sound, what we hear is a mixture of echo and the original sound, so the sound we hear is very loud and pure; When we talk in the open field, the sound travels, there are no tall buildings around, the sound cannot be reflected back, we only hear the original sound, so it does not sound as loud as the room.

Dear, hello, what I have added for you here is that the sound outside the house can be heard inside the house must be because the sound outside is loud, such as the sound of the car, the sound of the nuclear digging of the instrument, and the house is a small environment with the effect of closing the sound, so the sound can be greatly changed. I couldn't hear the sound inside the house because there was nothing in the house that could make a loud sound.

How to reflect the past.

Dear, do you mean that the outside is reflected into the inside of the house?

The sound of someone's machine, someone's.

Dear, their machines are too loud, aren't they?

If you want to be less noisy, you need to close the doors and windows.

The answer is uncertain and depends on the environment.

Because the same decibel sound, when talking in the house, before the sound is transmitted, it is equivalent to the sound wave being repeatedly refracted and transmitted in a relatively closed space, and finally transmitted through an unclosed place. Finally, a sound is heard outside the house (the magnitude is outside.

What the speaker actually hears is a 2-part synthesis: a small part of the original sound of the person in the room [the original sound directly transmitted to the receiver in the gap of the room] + b The voice of the speaker in the room is repeatedly refracted and transmitted through the space in the room, and then transmitted to the listener's voice through the gap in the room... And if you speak outside the house, the sound heard inside the house.

The size is in S) is also 2 parts: a small part of the original sound of the person outside the house [the original sound directly transmitted to the receiver in the gap of the room] + B The voice of the person outside the house is repeatedly refracted through the surrounding building environment and space, and then transmitted to the listener in the house through the gap in the house--- which is expressed in quantity: S outside = a + b, S inside = a + b.

At this time, a=a, so if b>b, the outside of s is greater than the inside of s; If B is less than B, Outside S is less than Inside. In a word, the answer is uncertain, and the result varies with the environment.

Mainly depends on the environment outside the house:

If the space outside the house is very empty, there is almost no refracted sound, and the sound heard by the people in the house will be inside and outside. The people in the house heard loud noises.

It must have been loud from outside the house to the house Common sense ah.

a. The difference is that the sound depends on the timbre of the voice, so A is wrong;

b. The sound heard on the second floor is transmitted from the sale and late transmission of the floor slab (solid), so Li B is correct;

c. Plucking different guitar strings can change the tone of the guitar, so C is wrong;

d. The sound outside the building can be heard by the shack scumbag, so it is not ultrasound, and the ultrasound is beyond the range of human hearing, so D is wrong

Therefore, b