How to convert voice recording into ultrasound and how to play it?

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Alberto Rojas

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Jan 3, 2015
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Hello everyone,

I need to convert a voice recorder into ultrasound (over 20,000 hz) and then play it, and I was wondering if anyone here could guide me to achieved that.

The reason I want to do this:

I am currently practicing self-hypnosis to cure myself from some nasty stuff I am going through. Self hipnosis is a technique in which a person suggests things to his own subconscious mind, such as: "my body is healing and I will start feeling better".

Humans are not able to hear ultrasound, but according to some research, the subconscious mind can actually perceive ultrasound and suggestions played this way will have a greater effect.

I have googled a lot and the only thing I found is that a software called "Audacity" might do this, but before I get into this I though it was a good idea to ask some audio proffesional so I can have the big picture in all this.

Also: if I found a way to convert the voice recorder into ultrasound, how should I play the file?? will standard headphones do the job??

Thank you for your attention, any feedback is welcome.

Best regards
 
Re: How to convert voice recording into ultrasound and how to play it?

Alberto said:
Hello everyone,

I need to convert a voice recorder into ultrasound (over 20,000 hz) and then play it, and I was wondering if anyone here could guide me to achieved that.

The reason I want to do this:

I am currently practicing self-hypnosis to cure myself from some nasty stuff I am going through. Self hipnosis is a technique in which a person suggests things to his own subconscious mind, such as: "my body is healing and I will start feeling better".

Humans are not able to hear ultrasound, but according to some research, the subconscious mind can actually perceive ultrasound and suggestions played this way will have a greater effect.

I have googled a lot and the only thing I found is that a software called "Audacity" might do this, but before I get into this I though it was a good idea to ask some audio proffesional so I can have the big picture in all this.

Also: if I found a way to convert the voice recorder into ultrasound, how should I play the file?? will standard headphones do the job??

Thank you for your attention, any feedback is welcome.

Best regards
Click to expand...

Just a couple of reasons why not:

Once you change the freq-it becomes something different.

Creating things in digital and playing it back above 20Khz is going to be difficult.

Then there is the whole transducer issue of reproducing above 20Khz. You are limited to piezo and some really expensive tweeters.

Yes upper freq can "affect us. Just play a 25Khz or so tone (you won't hear it) but after a little while you will start to get sick. But that is not "usable signal".
 
Re: How to convert voice recording into ultrasound and how to play it?

John Roberts said:
Read some different research. If your ears can't hear it, your subconscious can't either.

JR
Click to expand...

That is an assumption you can not prove, it is in fact a very simplistic view... I am looking for serious and constructive answers, I hope to find one..
 
Re: How to convert voice recording into ultrasound and how to play it?

Ivan Beaver said:
Just a couple of reasons why not:

Once you change the freq-it becomes something different.

Creating things in digital and playing it back above 20Khz is going to be difficult.

Then there is the whole transducer issue of reproducing above 20Khz. You are limited to piezo and some really expensive tweeters.

Yes upper freq can "affect us. Just play a 25Khz or so tone (you won't hear it) but after a little while you will start to get sick. But that is not "usable signal".
Click to expand...

Thank's for your answer,

What would my options be? If there is an option to achieve this, whether it is difficult or not, I will make it...
 
Re: How to convert voice recording into ultrasound and how to play it?

Alberto said:
That is an assumption you can not prove, it is in fact a very simplistic view... I am looking for serious and constructive answers, I hope to find one..
Click to expand...

Indeed, you can't perform double blind listening tests on sub-conscious perception, so I can not prove it, but a great deal of research has gone into human perception.
==========

To "convert" voice (say 100Hz to 3Khz) to be completely above 20kHz, a straight pitch shift would need 200x up-shift so 100Hz to 3kHz becomes 20kHz to 600kHz (not sure you can hear that high).

A more practical approach is to use a "heterodyne mixer" where you just shift up the signal 20kHz or so. Your vocal would then only take up 20,100Hz to 23kHz pass band .

You can probably play that back through a piezo tweeter but look out you don't give yourself a headache.

JR

PS: I suspect either approach will result in unintelligible noise (that you probably can not hear).
 
Re: How to convert voice recording into ultrasound and how to play it?

John Roberts said:
I
Your vocal would then only take up 20,100Hz to 23kHz pass band .

You can probably play that back through a piezo tweeter but look out you don't give yourself a headache.



Hello

Piezo tweeters are cheap and can be used - but be aware that your amp does not go in oscillation. You need to load it properly. Perhaps connecting 20W / 15 ohm resistor across amps output and then 0,47uF series capacitor for piezo and another 15 ohm resistor across piezo. First resistor keeps amp stable at all frequencies - second acts as impedance for the filter capacitor, while piezo impedance is very high.

All parts - including piezo - should be available for under 50.- for a stereo system

This is how reproduction can be done once you have the recording done. Personally I do not believe that this can lead to anything - I do not believe in homeopatic either...

Why not just make recorded loop with your "mantra" and have it play on low volume all night while you sleep?


Finally - because I am a curious brat - what kind of "nasty stuff" are you having ???
Click to expand...
 
Re: How to convert voice recording into ultrasound and how to play it?

John Roberts said:
A more practical approach is to use a "heterodyne mixer" where you just shift up the signal 20kHz or so. Your vocal would then only take up 20,100Hz to 23kHz pass band .

You can probably play that back through a piezo tweeter but look out you don't give yourself a headache.
Click to expand...
And adding to that it is a stretch that a 48khz soundcard can reproduce this. You'll probably need some 96khz soundcard for this if you were to do this in software. You can forget about mp3-players, iphones and similar as they discard sound pitches that high.

Have you looked into NLP and/or bineural beats or similar stuff for self hypnosis?
 
Re: How to convert voice recording into ultrasound and how to play it?

Hello

Considering bandwidth - I was aligning an old Studer A800 last friday - some channels were able to record/play up to 29kHz -3dB - many Revox-machines have gone up to 25kHz. Perhaps it would be o.k. to shift the band only up to 17-20kHz - unless you want to have tape deck reels hypnotizing you to sleep.
 
Re: How to convert voice recording into ultrasound and how to play it?

This clearly belongs in the basement. The OP does not comply with the full real name policy so why is this topic getting responses?
 
Re: How to convert voice recording into ultrasound and how to play it?

Rob Spence said:
Hmmm, if you could get the message up above 20kHz, how would you know your playback system was, in fact, playing it?


Sent from my iPad HD
Click to expand...

Not to continue with the chain of reality, but that's what microphones and analysis are for. :D~:-D~:grin:
 
Re: How to convert voice recording into ultrasound and how to play it?

Max Warasila said:
Not to continue with the chain of reality, but that's what microphones and analysis are for. :D~:-D~:grin:
Click to expand...
But you have to have mics and measurement gear that can go above 20K. That is harder these days (with digital) than in years past (with analog).
 
Re: How to convert voice recording into ultrasound and how to play it?

Rob Timmerman said:
For the OP, that may not be a big issue...
Click to expand...
I think it will be an issue.

He makes the statement "play the file".

What that means is that not only does it have to be recorded so that the file type can "playback above 20K", but also all of the recording and playback equipment have to be able to support that extended bandwidth.

Most of the "common gear" dies at 20K.

So there is a lot more involved than just the actual "material".
 
Re: How to convert voice recording into ultrasound and how to play it?

Rob Spence said:
Hmmm, if you could get the message up above 20kHz, how would you know your playback system was, in fact, playing it?


Sent from my iPad HD
Click to expand...

You have to believe.

It doesn't matter if this method has any basis in medical reality. If you believe it works, then it works. If you don't believe, it doesn't work. So BELIEF (faith) is the operative principle. If it requires a pile of sci-fi-ish equipment to induce belief, then so be it.

Placebo power!!!

I recommend Monster cables and don't forget to break in the entire mess with proper cryogenic treatment. Ultra-HF can be therapeutic, but keep your head out of the microwave...
 
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