Resonance

It is very hard to understand from the article in Wikipedia. Let's put it simple. Let's say we have a guitar with 6 chords. Each chord has a different thickness. If it is normally tuned you can pinch one chord and make it vibrate and all of the others will stay pretty much put. You will hear only the chord that you pinched until the vibration get dampened by the friction with surrounding air.

But if you intentionally put on the same guitar or even on two different ones two chords of the same thickness and tune them to make the same sound, if you will pinch one chord pretty soon the other will start vibrate and make the same sound. It will absorb half of the energy of the first chord and they both will vibrate until will spend all the initial energy and die. We can say they resonate at a resonance frequency and that is the frequency you tuned them to.

In buildings. Especially in those made of panels. Each panel has its own resonance frequency and more than one harmonics. Most of them will be the same size but will not have the same frequency as are assembled differently depending on the contact with the frame. If you can find a way to transfer some vibration to the walls from a source at resonance, you can make them vibrate. In a building made of panels you will have practically all kind of resonances at a multitude of frequencies.

If you use a blower in the parking lot or a noisy car or a plane passes by, some of the panels will vibrate in resonance with the instant frequency of the blower that changes constantly sweeping a range of frequencies.

A multitude of scenarios can happen. Usually dust falls from the walls. Air gets pumped inside and outside the walls bringing very unpleasant odors, bacteria and fungus from the walls inside and nutrients from the normal dust inside back in the walls.

More complicated things can be imagined as some walls in the building will have different substances in it, like formaldehyde, smoke from neighbors, etc. Depending on the frequency, only some walls will vibrate and fill the apartment with a certain thing, on demand. Even the bottles under the sink with things like chlorine, 409, etc. Once i found them all with their cap loose.

Every internal organ of one's body must have a resonance, and it can be different from one person to another as organ sizes match the person's size.

Yesterday across the street somebody used a creosote sweeping log to clean the chimney. For about 4 hours the place was filled with creosote smoke and i felt terrible. Shortness of breath, knot in my throat, dizziness for several hours and ruining the rest of my day. I  think some of that smoke turned into dust and falls from the walls while vibrating.

The noise itself can be annoying in a residential area.

Last night around 11 i went to bed. I was tired and slightly buzzed as i had a glass of cheap red wine not long before. I was about to fall asleep when my wife came and opened the bedroom's window together with the balcony door.

I liked the fresh air coming from outside. I didn't like i was waking back up. Then several cars passed by. One of them made an unusual high pitch loud sound for about 30 seconds. Probably a defective transmission or a rattle. The room got filled with some very fine dust. Smelled like wood dust. I closed the window. Then i started feeling very ill. Arrhythmia when laying down. Probably systemic allergy.

I went back up and started pacing around. Every time i tried to go back to sleep i had shortness of breath and arrhythmia. I turned on the computer. Spent a couple of hours until i felt good enough to go back to sleep. Everything came back to "normal".

Right now across the street right now are blowing leaves with power blowers. If i open the windows there will be at least 50 dB flooding the apartment. But even with the doors closed my ears almost hurt although i don't hear much.

This to me is happening for at least a decade. Hours lost almost every day to it. Time ruined. Life ruined.

Today. For a few hours there will be leaves blowing in the neighborhood. Then at night creosote smoke. Slammed doors from the neighbors all day. A new week is starting.

My plan for today included applying for some jobs. Now i write in the blog.