Audio Enhancement

I couldn't find anything close to resembling vocals. That background hum is quite widely spread across the spectrum and with all the surgical eq'ing required to eliminate that noise - you've probably just cut out most of the vocal range too.

fwiw here's a boosted EQ sweep accross the spectrum - one pass has a narrow filter, the second pass it's opened up somewhat. I had a few narrow cuts in place to eliminate some of the hum. Gain has been pushed pretty high...there's not much room for any more boosting. http://www.mediafire.com/listen/holai80ua5wqh39/soundcheck.wav

Might be better to build a tinfoil hat.
 
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Thank you to both of you for trying to assist me.
I really appreciate it.

Let me give you more background on my dilemma.
This has been going for about three years now. My boss has his own click of people who are trying to keep control of our department. He's ex-military so I don't trust him at all.

I'm very perseptive and I noticed that he somehow knew about the conversations my colleagues and I share in my office. I was paranoid and searched everywhere for a bug.

But I could find none. Then one day I came across a video on YouTube describing how easily any telephone could be used as a powerful eavesdropping device.

There are three popular methods.
1. The hook-switch bypass. In this method even though one puts the phone on the receiver the microphone does not switch off but continues to send room audio down the line. The audio can easily be heard if you connect headphones to the telephone cable.

2. The harmonica bug (aka infinity transmitter). This device is connect in series somewhere along your telephone line. When the eavesdropper dials your number he punches a code in his keypad this code send a tone down he line that activates the harmonica bug (hence the term harmonica bug), the bug then switches the microphone on without causing the phone to ring. However the eavesdropper must be quick to enter the code or the phone will ring once or ring normally. This usually raises the suspicion of the telephone owner.

3. The ringer method. The ringer is a special kind of magnet that can be used to transmit room audio down the telephone line. But in comparision to the other methods this method requires a powerful amplifier to pick up the audio downstream. And the eavesdropper must be close by to prevent audio losses along the line.

I know that my phone is compromised because the YouTube video said that one should open the phone and compare it to another phone of the same kind. Well I did that and found that the two cables that connect the ringer where swopped and resoldered onto the circuitboard. One can easily spot the soldering because of the large blobs of solder.

All my colleagues have the same modification. (I went around like 007 opening my colleagues phones during lunchtime lol). I kept this to myself though.

What could be accomplished by using swooping the ringer wires?

( I apologise for all the spelling errors. I downloaded some windows updates last night and this morning my laptop has some error saying "failure to install reverting to old settings" but its not responding. Now I'm typing this on my smartphone).

In short I know its not the hook-switch bypass since there's no audio leaving when the phone is hung-up.

I now know its not the ringer because you two could not find anything, neither could I using Audacity, Magix Audio Cleaning Lab, and Adobe Audition, I also contacted a audio forensics expert from the US and he says there's now audio in there.

So it must be the harmonica bug method. I found out ancedotally that it was a popular method pre-1994.
I also recall on about two or three seperate occasions a received a call and the person just hung-up on me. This is usually a sign that the eavesdropper didn't enter the code in time thus the bug didn't activate and my phone rung.

I have a plan though.

I just hope I can find the tone combination that activates the bug.
 
WilmaG said:
I also contacted a audio forensics expert from the US and he says there's now audio in there.
Click to expand...
What did the audio forensics expert in the US charge you to look at the audio file?
 
saor said:
What did the audio forensics expert in the US charge you to look at the audio file?
Click to expand...

Well I told them I would purchase the software if he could provide a demonstration by retrieving audio from that file :-)

If he did I would have purchased it. 599 US$.
Thats reasonable for the scandal I could cause at work.
 
WilmaG said:
Well I told them I would purchase the software if he could provide a demonstration by retrieving audio from that file :-)

If he did I would have purchased it. 599 US$.
Thats reasonable for the scandal I could cause at work.
Click to expand...
And he did - so you're gonna spend $600 on the software then? That's a lot of money to spend on a suspicion. Start looking for another job (you still need to buy the $600 dollar software though if that's the agreement you had with the 'specialist in the US').
 
By the way my laptop is back in working order.
I had to dig my an ancient laptop to do the recording. Because my new laptop as a headphone/mic combo jack. It won't take a standalone feed microphone. Do any of you know how to connect a microphone only to a combo jack?

I bought an 3.5mm headphone/mic splitter but it doesn't work.
So I just bought an iLuv USB Audio Adapter by Apple. Mac and PC compatible. I hope that works. The old machine is too slow.

Of course I have my own method but how would any of you listen to the audio along the telephone line on the PC?
 
saor said:
And he did - so you're gonna spend $600 on the software then? That's a lot of money to spend on a suspicion. Start looking for another job (you still need to buy the $600 dollar software though if that's the agreement you had with the 'specialist in the US').
Click to expand...

No he didn't he said there's nothing.
So according to our agreement I don't have to pay.
 
WilmaG said:
By the way my laptop is back in working order.
I had to dig my an ancient laptop to do the recording. Because my new laptop as a headphone/mic combo jack. It won't take a standalone feed microphone. Do any of you know how to connect a microphone only to a combo jack?

I bought an 3.5mm headphone/mic splitter but it doesn't work.
So I just bought an iLuv USB Audio Adapter by Apple. Mac and PC compatible. I hope that works. The old machine is too slow.

Of course I have my own method but how would any of you listen to the audio along the telephone line on the PC?
Click to expand...
You're making no sense at all & this tale is falling apart. You about to splash $600 on a bit of software because an audio forensics expert in the US helped you out but you're messing about on an old laptop and wonky combo jacks to record things with? Go buy a decent portable recorder or some spy equipment.
 
WilmaG said:
No he didn't he said there's nothing.
So according to our agreement I don't have to pay.
Click to expand...
Oh right. Still - if you were prepared to spend $600 then go buy some decent recording equipment.
 
Your suspicion is of course derived from the fact that you spend most of your time on these forums interacting with lame lifeforms whom no doubt create stimulating fantasies for you and themselves.
 
WilmaG said:
Your suspicion is of course derived from the fact that you spend most of your time on these forums interacting with lame lifeforms whom no doubt create stimulating fantasies for you and themselves.
Click to expand...
What suspicion? Also by your logic you're one of the lame lifeforms ;).
 
WilmaG said:
Your suspicion is of course derived from the fact that you spend most of your time on these forums interacting with lame lifeforms whom no doubt create stimulating fantasies for you and themselves.
Click to expand...

Where the F did this come from?
 
copacetic said:
If anyone can find any speech in there, I'd be very impressed...
Click to expand...

I have a proper sound card and good headphones and I couldnt hear one syllable.

Even the "bars" visualiser in WMP stayed consistent to the buzzing and clicking, basically a loop.
 
I was just looking at the db histogram for the audio.
Does anyone know how to only play audio less than -60 db?
 
WilmaG said:
I was just looking at the db histogram for the audio.
Does anyone know how to only play audio less than -60 db?
Click to expand...

You are playing it, only problem is the louder audio is still going to be there...

There is no miraculous way to extract the vocal that is (ostensibly) in there.
 
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