MY FAMILY CAN'T SLEEP DUE TO ULTRASONIC SOUND

Thanks for the suggestion. Low frequency ultrasound cannot go through ceiling or roof and cause sleep deprivation. If ultrasound is coupled directly into the skull bone and reaches the cochlea without passing through the middle-ear, much higher frequencies (up to about 200 kHz) will be audible. This effect (sometimes called ultrasonic hearing) was first discovered by divers exposed to a high-frequency ( 50 kHz) Sonar signal. Please read these articles:

If you want to know more information about Ultrasonic hearing by humans, you may do a search on the Internet. There are plenty of scientific articles which

You think that two unrelated tenants did this to you, one after the other. So you think that this sort of thing must be common? So how come there's never been anybody in the whole world caught doing this to cause annoyance to their neighbour? It just doesn't happen.

Like somebody else said, you're not Bin Laden. Nobody could possibly want to do such a thing to you. It just isn't credible by any stretch of the imagination that you'd get TWO tenants, one after the other, doing the bizarrest thing in the world.

This is the real world, not the X-files.

If you can't sleep, then you've got a medical problem, and it can only be solved if you see a doctor.

--
Dave Farrance

Low frequency sound gets through a lot better than ultrasound. Ultrasound is attenuated to almost nothing by walls or the roof because they're reflective and absorbent. Ultrasound can go through liquids like water - and human flesh to some extent because that's mostly water. But nobody's beaming ultrasound at you.

--
Dave Farrance

Good question. I found out that this noise reaches cochlea not through the inner ear. The inner ear has a band pass or otherwise called as filter not to pass sound above 20 kHz. The frequency of the ultrasound seems to be close to 100kHz or so couple with some other components. Please read this article:

.

If ultrasound is coupled directly into the skull bone and reaches the cochlea without passing through the middle ear, higher frequencies (up to about 200 kHz) will be audible. This effect (sometimes called ultrasonic hearing) was first discovered by divers exposed to a high-frequency ( 50 kHz) Sonar signal.

I talked to the FBI today in two locations. One FBI office started taking complaint. When I told them that I was calling from another state they gave me another phone number to call. We don't have an FBI office known to the public in the State I am residing. I called this mystery FBI office and spoken to an agent. He told me that there could be equipment, which can cause sleep deprivation, but they are very expensive! What an amazing statement with a remark of its price. He also added that I had to call the local police to document the presence of such a noise before they could start an investigation. I wonder how a tenant( a renter) could afford to buy such an expensive equipment unless it is sponsored by a terrorist union or gang. The FBI advised me to call the local police to document this. The problem with calling the local police is that they behave well when the police arrive. In other words, they may switch off the device and hide it when they see a police car in the parking lot.

I am thinking of calling the Homeland security to find out that the activity has any correlation with terrorist organizations to cause sleep deprivation of American people.

Well, it certainly has an all-star cast! And in 1974, that was before Cindy Williams got fat, and Teri Garr got old, wasn't it?

;-) Rich

I know that in NASA, ultrasonic is used to check an assembled satellite or any Payload to see whether there is any corrosion or breakage inside before loading into the space shuttle. Satellite components are not made with liquids. I could imagine exploiting heterodyne situation to penetrate through any solid material.

The famous

describes facts on Long Range Acoustic Device. Range: 300 meters (984 feet or about 3 city blocks) over land or 500 meters (1640 feet) over water, depending on environmental conditions Beam width: About 30 degrees

Size: 33-inch diameter by 5-inch thickness

Weight: 45 lbs

Input: Microphone, laptop, MP3 player, CD player, Phraselator translation device

Maximum Volume: 120 dB at 1 meter in normal operation, 146 dB sustained or 151 dB burst at 1 meter with override

...

--
There\'s no publicly known FBI office in Massachusetts?

I know that it is simple to make a ultrasound generator with a piezo electric transducer and increase its frequency by a higher voltage. Making this could only adds additional noise in the apartment. Besides the noise I hear is affect in the cochlea as its frequency is way above

20kHz and close to 100kHz. What I am experiencing is an Ultrasonic-hearing nuisance.

Tech

Its none of any of that kind as I gathered so much information about this noise nuisance. I like to find out how to eliminate this weird nuisance of "ultrasonic hearing" caused by our tenants.

I hope there will be power outages and power spikes like what happned yesterday which knocked off this weird mean machine at night and we all slept well thereafter.

Tech

YD wrote:

I simply don't believe that you are a professional circuit designer.How is that!

Tech

yep a quality micrphone and a digital scope would let the OP record the waveform and post it on a website

martin

--- From what you've written so far, there's obviously a wide gulf between what you believe and what's real, so what you believe I am or am not is irrelevant. _That's_ how it is.

-- John Fields Professional Circuit Designer

What type of microphone did you measure it with?

Are you quite sure you weren't picking up a long-wave radio signals on the mic wiring?

But they were in water and you are in air. Also, Sonar signals are often pulsed with killowatts of energy - you would probably notice other effects if this was occurring in your flat (liquid turning to mist in open containers, solid food turning to jelly on the plate).

Did you try turning off the electricity and water last night? What happened?

--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

Nothing anyone say to these people will have an effect; might as well take the piss.

They are either trolls in which case they will rant on-and-on just to get the attention, or they are real cooks in which case they exist entirely in their own closed universe.

Of course the OP will know that "John Fields" is one of "them" and not listen to him.

Well - it would be if the life insurance paid up.

Thanks for your comment. I used a condenser wide-band microphone to record it. The presence of extremely high frequency ultrasound is inside the apartment and not outside anywhere.

I had posted yesterday that we were able to sleep because of a series of power outage and spikes on the power line, which may have offset the calibration of the gizmo (device) the tenant is using. The same thing happened yesterday as well. We had a series of power outage with frequency of a buzzer and it produced high voltage in the power outlets that we need to disconnect all of our electronic entertainment systems. We also heard the tenant running toward something kept above our bed on their floor. After this incident, no noise and we all slept well again. I hope these power outages continue as they work to counter measure this abuse of sleep deprivation by generating extreme high frequency "ultrasonic hearing".

I live in the USA and I read on the Internet that in states like New Jersey these unlawful practices are common and it is spreading through out the USA. I live not so far from NJ.

Yes, indeed this a conspiracy probably with a monitory gain. We have two tenants related to each other and it says all about conspiracy.

All of my family members can't sleep and we hear the noise only with the confinement of our apartment. If we all healthy people show up in front of a family doctor for the same problem, they would ask us to get an acoustics specialist.

Well, I do not know whether you read a post I made yesterday that after having a series of power outages and spikes the tenant's gizmo (device) stopped working and there was no noise. We all slept well day before yesterday. The same thing happened yesterday with a series of power outages and spikes with a frequency of a buzzer and the voltage in the power outlets were so high that we need to disconnect all the electronics entertainment systems. We heard the tenant running toward something kept above our heads on their floor. After this incident the noise stopped and we all slept well. I hope this power outages continues up until their gizmo (device) gets fried for good.

--
John Fields
Professional Circuit Designer

I don't live in Massachusetts. In the state I live there is no publicly known FBI office. Well, it seems you know something.

I would call the Homeland security to investigate this nuisance of super high frequency noise problem and to assess whether these practices are to cause sleep deprivation among American people to debilitate them and thereby making them less efficient or inefficient at work so that in the event of a nuclear attack or so, Americans wont know what to do. I characterize using sound as weapon as heinous inhumane activity and thus no less than outright terrorism on humans.Checkout

for sound as a weapon.

I may mention that the noise problem went away after a series of power outages and high amplitude spikes on the powerlines we had for the past two days. I hope this continues till their gizmo (device) gets fried.

All that I can say is thanks! Don't ask me to whom.

--
More to the point:

 http://www.fortunecity.com/campus/psychology/781/lithium.htm#