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Ever hear a sound and wonder WTF it was?

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MagnusTheBrewer said:
I don't know, I've felt some 12 or 13 cycle notes from large amps (for concert use) that gave me the willies. The hull could have conspired as a transducer. 🙂
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We have such amps. This was easily megawatts of acoustic power. That would need close to a gigawatt of input power to generate with dynamic displacement. Great Scott! Good thing we weren't going anywhere near 77 knots (88mph)!
 
Rubycon said:
I don't believe in ghosts, sea monsters or any of that fantasy stuff but I have to tell you I was /am scared shitless of whatever that was. I rarely use the F word and did, several times as a matter of fact! :$
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Do you not realize then that this, that you experienced, is just in part of why all that "fantasy stuff" exists in the first place? 🙄
strange experiences and sightings, your story is now among the billions of others out there and they all still fall into the same category. the unexplained.

I've heard plenty of sounds i can't explain, doesn't mean its not logical explanation nor does it mean its not something paranormal either. I even saw a shadow figure move from one room to another once....but that story must be fantasy right?
 
DarkVision said:
Do you not realize then that this, that you experienced, is just in part of why all that "fantasy stuff" exists in the first place? 🙄
strange experiences and sightings, your story is now among the billions of others out there and they all still fall into the same category. the unexplained.

I've heard plenty of sounds i can't explain, doesn't mean its not logical explanation nor does it mean its not something paranormal either. I even saw a shadow figure move from one room to another once....but that story must be fantasy right?
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Even if I took your free ipad offer it would fail to re-produce the perceived event. Not just because the included earbuds half loudness point is just shy of forty cycles per second but its internal circuity limits the lower frequency response to just above the infrasonic limits of human ears.

Point is the frequency was very low in the single digit range but loud enough to create the popped eardrum phenomena experienced in pressurized airliner cabins when the pressure drops 1/4 bar in a minute or so.

Now imagine those compressions and rarefactions occurring every 3-5 seconds.

I do have contacts with folks that research natural acoustic phenomena and design transducers to record it. If it happens again I will have an actual waveform. I have synthesized it but since no loudspeaker (and most amps for that matter) can reproduce it, there is no sense in sharing (the simulation).

I have played it back through my UE-10 IEMs with an amp that can drive the motors to their mechanical limits and the sensation is awful like hungry mealworms feeding on cochleatic fluid are swimming around doing the watsui, trying to slither up the semi circular canals. The sensation of vertigo is real and occurs within the first cycle as a shock would when a 9V battery is licked with the tongue. This would probably be appropriate for someone to experience while watching the scene from Star Trek II The Wrath of Khan where his "pets" crawl in the ears of their victims. D:
 
OutHouse said:
yea, a couple of years ago i was the only one home so i was watching TV and all of a sudden it sounded like a bowling ball or something was dropped in the kitchen. scared the holy shit out of me even the dog jumped up barking. went to the the kitchen nada, nothing there nothing broken nothing out of place. went outside again nothing hit the house. got a ladder and check out my roof and still nothing. i dont have a clue on what the hell it was, but it was loud and violent, i thought for sure was going to find a hole in my kitchen floor.
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There was a water-hammer issue here in the apartment awhile back. The convenience store in the other half of the building had a soft icecream machine, and every so often it caused some rapid pressure fluctuations, which made the pipe under the kitchen floor start pounding against it like crazy. Scared the hell out of me the first time it happened.


The more recent thing for me was a few days ago. Fairly quiet in the bedroom late at night, lights are out, and then it sounded like something very distinctly tapped the floor twice, about 2 seconds apart, just 2-3 feet from the head of the bed.
Really creepy to hear something like that.
I turned on the light only to find...absolutely nothing. Not even a mouse or an insect or anything.
The effect still hasn't really worn off on me. I figure that it was just the frame of the building re-settling due to the change in temperature, as I'd been away for several days, so it was the first time in about a week that the air conditioning was on. But Jesus...it wasn't easy sleeping that night.

The really fun part: The head of my bed is near to the closet, which is open to the crawlspace behind the wall. The cramped, dark, cobweb-ridden crawlspace. You could have quite a few people hidden back there.
 
Ruby works on a cruise ship? Hmm, why am I just learning this now. :hmm:

They're doing an addition to my office so we get weird noises all the time. Almost like a drilling sound but it resonates through the entire building. It's strong enough to cause the studio lights to rattle. Nobody seems to know what causes it.
 
Jeff7 said:
There was a water-hammer issue here in the apartment awhile back. The convenience store in the other half of the building had a soft icecream machine, and every so often it caused some rapid pressure fluctuations, which made the pipe under the kitchen floor start pounding against it like crazy. Scared the hell out of me the first time it happened.


The more recent thing for me was a few days ago. Fairly quiet in the bedroom late at night, lights are out, and then it sounded like something very distinctly tapped the floor twice, about 2 seconds apart, just 2-3 feet from the head of the bed.
Really creepy to hear something like that.
I turned on the light only to find...absolutely nothing. Not even a mouse or an insect or anything.
The effect still hasn't really worn off on me. I figure that it was just the frame of the building re-settling due to the change in temperature, as I'd been away for several days, so it was the first time in about a week that the air conditioning was on. But Jesus...it wasn't easy sleeping that night.

The really fun part: The head of my bed is near to the closet, which is open to the crawlspace behind the wall. The cramped, dark, cobweb-ridden crawlspace. You could have quite a few people hidden back there.
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nope not a water pipe problem. we have been in this house for 15 years and that was the only time i have hear it. it was one loud bang/thud on the floor. i even felt it in the couch. my first thought was a piece of a plane landing at DIA crash through the house.
 
OutHouse said:
nope not a water pipe problem. we have been in this house for 15 years and that was the only time i have hear it. it was one loud bang/thud on the floor. i even felt it in the couch. my first thought was a piece of a plane landing at DIA crash through the house.
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I was just telling my own "loud noise in kitchen" story. 🙂

Weird.


Some day, we'll have robots that will be able to track down those odd little noises. 😀
 
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well, i thought what i heard was rain...and sure enough it was. and then i ran outside to find the windows on my car down partly 🙁
 
mmntech said:
Ruby works on a cruise ship? Hmm, why am I just learning this now. :hmm:

They're doing an addition to my office so we get weird noises all the time. Almost like a drilling sound but it resonates through the entire building. It's strong enough to cause the studio lights to rattle. Nobody seems to know what causes it.
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When I was working at the hospital they were doing blasting maybe 500m away for road construction. Every now and then we'd feel the whole building shake and it would actually make a large bang. It felt very local. Later on we learned it was the blasting. Weirdest thing ever. I hope nobody was on the operating table getting brain surgery or something. 😱

Another time I was in a storage room and I could feel someone was drilling in the ceiling on the floor below. It felt like the bit was going to come right through, I was kinda moving pretty fast scared it might come through my foot LOL. Chances are they were further, it's incredible how sounds can resonate through a building.
 
My best guess is you heard the rumble of an underwater landslide. Best explanation for a low pitched sound transmitted through the water other then a seismic event.
 
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