Golden Audio correspondance.

[Paulhoff]

“Digital tape machines a drug on the market”. From my point of view, thank-the-gods of audio. JJ may back me up on this, or hit me in the head. I am used to this being a married man.
Going out to in-laws for dinner.

Paul

 

[Jyera]

Is military radar sonic or electromagnetic?

I had the impression that it is based on similar principles as Bats, which i'm quite certain it is sonic.

And does it use 1GHz sonic or 1GHz electromagnetic waves?

I also recall a term called Sonar which is radar using sound?
I suppose submarine use them.

 

[Paulhoff]

Military radar electromagnetic.

http://en.wikipedia.org/wiki/Radar

Paul

 

[Bronze Dog]

Is military radar sonic or electromagnetic?

I had the impression that it is based on similar principles as Bats, which i'm quite certain it is sonic.

And does it use 1GHz sonic or 1GHz electromagnetic waves?

I also recall a term called Sonar which is radar using sound?
I suppose submarine use them.

Military radar is electromagnetic. You confusion might be a result of an analogy: Radar works because the radio waves they send out bounces back. Sonar (used by bats and subs) works because sound waves bounce back.

Radar is actually an acronym that includes that includes "radio" as one of the letters. I'm sure someone knows the whole thing.

 

[Ducky]

At Last, a reply.

Dear David:

Our Ultra Tweeters actually give you very high frequency sound wave, not electronic signal. It should not interfere with pace makers, digital receivers or any military broastcast.

Sincerely<

allenchang
goldensound

Seems like someone needs to review the radio spectrum again...

 

[ktesibios]

Rereading the OP, it seems clear that they really are claiming that their tweeters produce sound at 10^9 Hz, and that their use of "GHz" isn't a typo.

That's an unfalsifiable claim. The upper frequency limit of available measurement transducers is <200 kHz. There's simply no way that the radiation of acoustic energy at the claimed frequencies could be tested.

I wonder where on Earth they think that the signal which their tweeters are purported to reproduce is supposed to come from. There is no recording medium nor broadcast technology nor audio amplifier which has that kind of baseband bandwidth.

It might be worth asking them that question.

 

[Frinkiak7]

Military radar is electromagnetic. You confusion might be a result of an analogy: Radar works because the radio waves they send out bounces back. Sonar (used by bats and subs) works because sound waves bounce back.

Radar is actually an acronym that includes that includes "radio" as one of the letters. I'm sure someone knows the whole thing.

RADAR: RAdio Detection And Ranging.

SONAR: SOund Navigation And Ranging

LIDAR: LIght Detection And Ranging

 

[Paulhoff]

"GHz" isn't a typo. It is like all the other snake-oil going on. Bake you wire in the oven for 48 hours. Break in period for wire etc.

I wish I have the starship Enterprise. To the late Scotty, “Beam me up, I have found no intelligent life down here, hurry”.

This is not meant for the few I have found here.

Paul

 

[Jyera]

Main Question:

How do I tell an installed Ultra Tweeter is working ?

I thought the following might be a way to test the Ultra tweeter.

Step for Ultra Tweeter Feedback Test:
1. Connect a microphone to an amplifier
2. Connect the Ultra Tweeter to the amplifier.
3. Adjust Amiplifier to cut off all frequencies.
(Logically only the very low and very high frequencies beyond the range of the normal amplifier will remain.
4. Point the microphone to the UltraSpeaker, feedback should cause the GHz sonic signal to be amplifed.

Questions:

Q1: Any comments on what will happen if we did the above?
Q2: Presumably I won't be able to hear a GHz sound, is it correct ?
Q3: What is the impact of an inaudible GHz range sonic feedback?
(a) to human health
(b) to animal health
(c) to music listening
(d) to glass ware in home.

Q4: When I do Karaoke, when I move the mike too close the speakers, I get feedback. I would move away to avoid the feedabck. But for GHz range sonic feedback, how will I know it ?

 

[Ducky]

The main problem is that I don't think it would feedback that way. Since you're cutting out the signals the amplifier can handle, and it doesn't go that high, I don' t think you would be able to create a feedback loop.

I was thinking that a scanner in the gHz range is the best way. Use a HAM radio.

That was a clever idea though.

 

[Jyera]

Rereading the OP, it seems clear that they really are claiming that their tweeters produce sound at 10^9 Hz, and that their use of "GHz" isn't a typo.

That's an unfalsifiable claim. The upper frequency limit of available measurement transducers is <200 kHz. There's simply no way that the radiation of acoustic energy at the claimed frequencies could be tested.

I wonder where on Earth they think that the signal which their tweeters are purported to reproduce is supposed to come from. There is no recording medium nor broadcast technology nor audio amplifier which has that kind of baseband bandwidth.

It might be worth asking them that question.

With a common computer CPU working at clock speed in excess of 1 GHz. I thought it is not unimaginable that we could create a GHz range sonic signal with the help of a normal computer chip. Thereby producing a GHz testing signal for the Ultra Tweeter without a GHz microphone.

 

[Ducky]

With a common computer CPU working at clock speed in excess of 1 GHz. I thought it is not unimaginable that we could create a GHz range sonic signal with the help of a normal computer chip. Thereby producing a GHz testing signal for the Ultra Tweeter without a GHz microphone.

NOW you're talkin.

OK, how do we convert the processor emissions to line level output?

 

[Jyera]

NOW you're talkin.

OK, how do we convert the processor emissions to line level output?

Don't know. Not a circuit designer ...
Just aware that clock speed of CPU nowadays are usually interms of Ghz.

Perhaps 2 ways.

Option (1):
Use an Amplifier to amplify the GHz digital signal as if it is an analog signal input. Use some circuit to smoothen the square wave. I suppose this approach depends on the capability of exisiting amplifier.


Option (2):
Use the 0101010.... GHz digital signal to control a transistor circuit. The transitor circuit acts as a switch between two currents. One current is used to "push", One current is used to "pull". Switching between the two cause a GHz vibration.

 

[Ducky]

Don't know. Not a circuit designer ...
Just aware that clock speed of CPU nowadays are usually interms of Ghz.

Perhaps 2 ways.

Option (1):
Use an Amplifier to amplify the GHz digital signal as if it is an analog signal input. Use some circuit to smoothen the square wave. I suppose this approach depends on the capability of exisiting amplifier.


Option (2):
Use the 0101010.... GHz digital signal to control a transistor circuit. The transitor circuit acts as a switch between two currents. One current is used to "push", One current is used to "pull". Switching between the two cause a GHz vibration.

Your second option I would need to research a bit more. I think it may have promise, but I am far from an expert on the programming.

The first option is more difficult. Firstly, most amplifiers used for music, or PA or whatnot, don't have the frequency response to even register in the gHz. So while I would like to see some way to amplify the signal analog, I don't see how it's possible without an amp designed to have a frequency response in that range. Though, the idea has merit. It could possibly be that we could somehow take the emissions from the tweeters in close response to antannae for a ham radio and amplify it, that doesn't solve how it could be emitting the frequency in the first place. Sources in home or professional audio don't emit it.

This leaves me with the original dillemma. Either this is not doing anything at all, or it is transposing frequencies up and emitting them. The latter we can certainly test with ham equipment.

I have been talking to a good friend of my mother's, Dr. Harvey Slatin (He's going to be 90 years old on Aug 17th, and he worked under Oppenheimer at Los Alamos, a fact I did not know until recently) and he agrees that there is no source fore the emissions in gHz from standard or even premium audio components.

So the dilemma of the claim is a problem here. How do we test the (as of now) untestable scientifically? I am sure there is a way, but I am reserved to speculate what that is.

What do you think? What if we tested if they even emit anything from a standard audio source with a ham reciever?


edited to add:

analog pickup of the signal is also a problem. Every mic I work with can't pickup frequencies that high. we would need a scanner and antennae.

 

[a_unique_person]

AC Power cables at $700?

Premier AC power Cable. (Blue)
Provides effortless, extended treble, enhanced details, authoritative bass, better transient response. As soon as you hear your equipment with the Premier AC power cable, you will have a better understanding of the difference between natural sound and bloated midrange and between solid bass and hollow sound. Made of silver coated with gold.

$600 for 5 feet
$700 for 6 feet

Premier AC Power Cable. (Red)
Premier AC power cable outperforms its competitor by a wide margin, no matter what price. Made of silver coated with gold.

$1000 for 5 feet
$1200 for 6 feet

I want my whole power cable back to the power station made of silver, otherwise, what's the point? Until then, bloated midrange is going to be the bane of my life.

 

[Ducky]

AC Power cables at $700?



I want my whole power cable back to the power station made of silver, otherwise, what's the point? Until then, bloated midrange is going to be the bane of my life.

I am assuming you're taking this from the Golden Audio site...

I laugh like you do. If not just for the properties of Fletcher Muson Curve

oh you hear more midrange? funny how that's EXACTLY WHAT PHYSICS HAVE SHOWN.

Idiots.

 

[Jyera]

Found this :
Titled: Temperature dependence of 9.37 GHz sound transmission through Invar
http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=7236546

These people should be able to measure and create the 9.37GHz sound.

Maybe they can provide some expertise to comment on GoldenSound product.

 

[Mojo]

AC Power cables at $700?

Premier AC power Cable. (Blue)
Provides effortless, extended treble, enhanced details, authoritative bass, better transient response. As soon as you hear your equipment with the Premier AC power cable, you will have a better understanding of the difference between natural sound and bloated midrange and between solid bass and hollow sound. Made of silver coated with gold.

$600 for 5 feet
$700 for 6 feet

Premier AC Power Cable. (Red)
Premier AC power cable outperforms its competitor by a wide margin, no matter what price. Made of silver coated with gold.

$1000 for 5 feet
$1200 for 6 feet

I want my whole power cable back to the power station made of silver, otherwise, what's the point? Until then, bloated midrange is going to be the bane of my life.

And what's the betting that the "Red" will be exactly the same cable as the "Blue," but with a different colour coating (or possibly even just different coloured packaging - actually, maybe not, as that would mean that, in use, it would be indistinguishable from the "Blue" ).

Edited to add: Having looked at the website, is see it's illustrated with what I assume is the "Red" cable: a black cable with a red label on it. I wonder what the "Blue" cable looks like.

 

[Mojo]

Until then, bloated midrange is going to be the bane of my life.

Actually, I've been noticing that my midrange has been getting a little bloated lately. My doctor recommends dieting and exercise, but maybe I just need a new power cable. Perhaps I can get one on the NHS.

 

[ktesibios]

Looks like I failed to make my point clear.

There wouldn't be any problem generating a test signal to feed into these tweeters. Producing plenty of electrical power at microwave frequencies is nothing unusual these days- after all, the magnetron in an ordinary microwave oven produces several hundred watts at 2.3 GHz.

But, if you do drive the tweeters with an appropriate amount of power up around 1 GHz- how can you possibly determine whether they are radiating sound, i.e., acoustic energy, at that frequency when there is no Earthly instrument capable of detecting it?

And, even if against all probability the things do radiate sound at 1 GHz, what reason is there to expect that energy in that frequency range is present in recorded or broadcast listening material?

There is no recording medium, digital or analog, which has that kind of bandwidth. Neither is there a broadcast medium in use for audio program material which can transmit a baseband signal containing energy at microwave frequencies.

And, even if you had an audio program source which covered that kind of bandwidth, there ain't no such thing as an audio power amp which could reproduce those frequencies.

Apart from the sheer unfalsifiability of the "reproduces sound at 1 GHz" claim, they're offering these things for sale to people who will use them with conventional audio program sources and amplification systems.

That's what I meant. For those reasons the absurdity of the claim ought to be apparent on its face.