Is this a cell phone?

[Ty Ford]

Hey,

I got a brand new interference sound I've never heard before today coming in
on a mic during a session here.

http://home.comcast.net/~tyreeford/cell.wav

Has anyone heard this yet? What is it?

The client said her cell phone was dead off.

I swapped out the cable for one that Eric Toline had wired up with the
Neutrik EMF defeating XLRs and the noise went away.

Regards,

Ty Ford

--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA

[Don Pearce[_3_]]

On Fri, 13 May 2011 15:23:25 -0400, Ty Ford >
wrote:

>Hey,
>
>I got a brand new interference sound I've never heard before today coming in
>on a mic during a session here.
>
>http://home.comcast.net/~tyreeford/cell.wav
>
>Has anyone heard this yet? What is it?
>
>The client said her cell phone was dead off.
>
>I swapped out the cable for one that Eric Toline had wired up with the
>Neutrik EMF defeating XLRs and the noise went away.
>
>Regards,
>
>Ty Ford
>
Well it is certainly not a GSM phone. Maybe 3G or GPRS - I haven't
heard what they sound like as a source of interference.

d

[Martin Harrington]

As I'm in a country (Australia), that uses GSM & GPRS, it's certainly not
a noise that I've heard from a mobile device.

Martin Harrington


On 14/05/11 7:12 AM, in article
, "Don Pearce" >
wrote:

> On Fri, 13 May 2011 15:23:25 -0400, Ty Ford >
> wrote:
>
>> Hey,
>>
>> I got a brand new interference sound I've never heard before today coming in
>> on a mic during a session here.
>>
>> http://home.comcast.net/~tyreeford/cell.wav
>>
>> Has anyone heard this yet? What is it?
>>
>> The client said her cell phone was dead off.
>>
>> I swapped out the cable for one that Eric Toline had wired up with the
>> Neutrik EMF defeating XLRs and the noise went away.
>>
>> Regards,
>>
>> Ty Ford
>>
> Well it is certainly not a GSM phone. Maybe 3G or GPRS - I haven't
> heard what they sound like as a source of interference.
>
> d

[MarkK]

> >> Hey,
> >>
> >> I got a brand new interference sound I've never heard before today
coming in
> >> on a mic during a session here.
> >>
> >> http://home.comcast.net/~tyreeford/cell.wav
> >>
>

OK I'll admit I didn't hear any noise...

Can everyone else here it? I can't...

Maybe that's why I'm such a big believer in measurements..

Mark

[Don Pearce[_3_]]

On Fri, 13 May 2011 20:59:19 -0400, "MarkK" >
wrote:

>
>> >> Hey,
>> >>
>> >> I got a brand new interference sound I've never heard before today
>coming in
>> >> on a mic during a session here.
>> >>
>> >> http://home.comcast.net/~tyreeford/cell.wav
>> >>
>>
>
>OK I'll admit I didn't hear any noise...
>
>Can everyone else here it? I can't...
>
>Maybe that's why I'm such a big believer in measurements..
>
>Mark
>
>

I've extracted and amplified the offending part here

http://www.soundthoughts.co.uk/listen/cell1.wav

d

[John Williamson]

Don Pearce wrote:
> On Fri, 13 May 2011 20:59:19 -0400, "MarkK" >
> wrote:
>
>>>>> Hey,
>>>>>
>>>>> I got a brand new interference sound I've never heard before today
>> coming in
>>>>> on a mic during a session here.
>>>>>
>>>>> http://home.comcast.net/~tyreeford/cell.wav
>>>>>
>> OK I'll admit I didn't hear any noise...
>>
>> Can everyone else here it? I can't...
>>
>> Maybe that's why I'm such a big believer in measurements..
>>
>> Mark
>>
>>
>
> I've extracted and amplified the offending part here
>
> http://www.soundthoughts.co.uk/listen/cell1.wav
>
It sounds to me like something automatically dialling a DTMF sequence. I
can't work out how it would be coming in as RF, though, unless it's an
analogue cordless phone nearby.

--
Tciao for Now!

John.

[hank alrich]

Don Pearce > wrote:

> On Fri, 13 May 2011 20:59:19 -0400, "MarkK" >
> wrote:
>
> >
> >> >> Hey,
> >> >>
> >> >> I got a brand new interference sound I've never heard before today
> >coming in
> >> >> on a mic during a session here.
> >> >>
> >> >> http://home.comcast.net/~tyreeford/cell.wav
> >> >>
> >>
> >
> >OK I'll admit I didn't hear any noise...
> >
> >Can everyone else here it? I can't...
> >
> >Maybe that's why I'm such a big believer in measurements..
> >
> >Mark
> >
> >
>
> I've extracted and amplified the offending part here
>
> http://www.soundthoughts.co.uk/listen/cell1.wav
>
> d

I love this place.

--
shut up and play your guitar * http://hankalrich.com/
http://www.youtube.com/watch?v=NpqXcV9DYAc
http://www.sonicbids.com/HankandShaidriAlrichwithDougHarman

[[email protected]]

On May 14, 2:48*am, John Williamson >
wrote:
> Don Pearce wrote:
> > On Fri, 13 May 2011 20:59:19 -0400, "MarkK" >
> > wrote:
>
> >>>>> Hey,
>
> >>>>> I got a brand new interference sound I've never heard before today
> >> coming in
> >>>>> on a mic during a session here.
>


I´d put my money on that source being a cell phone of some kind, it
doesn´t sound like RFI of any kind, but much more like a DTMF acoustic
dial tone, you´d be amazed at just how much digital and analogue
garbage comes out of these things at tonnes of separate frequencies,
even when they´re in so called ´silent´ mode or even when in standby.
I have this old compact 5W self-powered speaker system that has some
kind of weird transformer in it, sat in my studio. It was made in the
days ´pre-mobile phone´ and seems to react to every bit of high-end EM
spectrum noise that´s around, makes for quite an effective yard stick
to see what digital garbage is floating around in a potential
location, I often take it out on audio reccies... But this sounds like
it came out of a digital amplifier, of the kind used in cells... on my
Grado cans, I can also hear on your original recording low frequency
vibrations preceding the musical tone, they sound like LF battery
vibrate alerts, also from a cell. Many clients put their phones on
´silent´ and consider that to be ´off´... or possibly, there was
another one in the room?

[MarkK]

> > >
> > >OK I'll admit I didn't hear any noise...
> > >
> > >Can everyone else here it? I can't...
> > >
> > >Maybe that's why I'm such a big believer in measurements..
> > >
> > >Mark
> > >
> > >
> >
> > I've extracted and amplified the offending part here
> >
> > http://www.soundthoughts.co.uk/listen/cell1.wav
> >
>>
OK I hear that in the original at 0:14 but that is AFTER the take?

Mark

[Don Pearce[_3_]]

On Sat, 14 May 2011 15:00:24 -0400, "MarkK" >
wrote:

>
>> > >
>> > >OK I'll admit I didn't hear any noise...
>> > >
>> > >Can everyone else here it? I can't...
>> > >
>> > >Maybe that's why I'm such a big believer in measurements..
>> > >
>> > >Mark
>> > >
>> > >
>> >
>> > I've extracted and amplified the offending part here
>> >
>> > http://www.soundthoughts.co.uk/listen/cell1.wav
>> >
>>>
>OK I hear that in the original at 0:14 but that is AFTER the take?
>
>Mark
>
>
The same sound is present during the start of the take, but nothing
like as obvious.

d

[Steve King]

"hank alrich" > wrote in message
...
> Don Pearce > wrote:
>
>> On Fri, 13 May 2011 20:59:19 -0400, "MarkK" >
>> wrote:
>>
>> >
>> >> >> Hey,
>> >> >>
>> >> >> I got a brand new interference sound I've never heard before today
>> >coming in
>> >> >> on a mic during a session here.
>> >> >>
>> >> >> http://home.comcast.net/~tyreeford/cell.wav
>> >> >>
>> >>
>> >
>> >OK I'll admit I didn't hear any noise...
>> >
>> >Can everyone else here it? I can't...
>> >
>> >Maybe that's why I'm such a big believer in measurements..
>> >
>> >Mark
>> >
>> >
>>
>> I've extracted and amplified the offending part here
>>
>> http://www.soundthoughts.co.uk/listen/cell1.wav
>>
>> d
>
> I love this place.


It sounds to me more like a simple digital game sound effect. Or a ring
tone.

Steve King

[Scott Dorsey]

Ty Ford > wrote:
>
>I got a brand new interference sound I've never heard before today coming in
>on a mic during a session here.
>
>http://home.comcast.net/~tyreeford/cell.wav
>
>Has anyone heard this yet? What is it?

It's not a cellphone. It doesn't sound like FSK data either.

By any chance were you recording near a paging system tower? Old-style
paging services were on 30-50 Mhz band and sounded kind of like that.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Ty Ford]

On Sat, 14 May 2011 17:05:38 -0400, Scott Dorsey wrote
(in article >):

> Ty Ford > wrote:
>>
>> I got a brand new interference sound I've never heard before today coming
>> in
>> on a mic during a session here.
>>
>> http://home.comcast.net/~tyreeford/cell.wav
>>
>> Has anyone heard this yet? What is it?
>
> It's not a cellphone. It doesn't sound like FSK data either.
>
> By any chance were you recording near a paging system tower? Old-style
> paging services were on 30-50 Mhz band and sounded kind of like that.
> --scott

Nope. It was here in my studio where I have recorded umpteen hours of stuff
and never heard anything like this. What's weirder is that at other times it
varied in intensity (loudness) even within one sequence; fading in and out.

Regards,

Ty Ford


--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA

[g]

On May 15, 9:41*am, Ty Ford > wrote:
> On Sat, 14 May 2011 17:05:38 -0400, Scott Dorsey wrote
> (in article >):
>
> > Ty Ford > wrote:
>
> >> I got a brand new interference sound I've never heard before today coming
> >> in
> >> on a mic during a session here.
>
> >>http://home.comcast.net/~tyreeford/cell.wav
>
> >> Has anyone heard this yet? What is it?
>
> > It's not a cellphone. *It doesn't sound like FSK data either.
>
> > By any chance were you recording near a paging system tower? *Old-style
> > paging services were on 30-50 Mhz band and sounded kind of like that.
> > --scott
>
> Nope. It was here in my studio where I have recorded umpteen hours of stuff
> and never heard anything like this. *What's weirder is that at other times it
> varied in intensity (loudness) even within one sequence; fading in and out.

[G. John Garrett, CAS]

I can't tell on this computer, sounds pretty good (hey, cheap speakers). Send me
a couple more samples.

jg

> On May 15, 9:41 am, Ty Ford > wrote:
>> On Sat, 14 May 2011 17:05:38 -0400, Scott Dorsey wrote
>> (in article >):
>>
>>> Ty Ford > wrote:
>>>> I got a brand new interference sound I've never heard before today coming

[g]

On May 15, 8:22*pm, G > wrote:
> On May 15, 9:41*am, Ty Ford > wrote:
>
>
>
>
>
> > On Sat, 14 May 2011 17:05:38 -0400, Scott Dorsey wrote
> > (in article >):
>
> > > Ty Ford > wrote:
>
> > >> I got a brand new interference sound I've never heard before today coming
> > >> in
> > >> on a mic during a session here.
>
> > >>http://home.comcast.net/~tyreeford/cell.wav
>
> > >> Has anyone heard this yet? What is it?
>
> > > It's not a cellphone. *It doesn't sound like FSK data either.
>
> > > By any chance were you recording near a paging system tower? *Old-style
> > > paging services were on 30-50 Mhz band and sounded kind of like that.
> > > --scott
>
> > Nope. It was here in my studio where I have recorded umpteen hours of stuff
> > and never heard anything like this. *What's weirder is that at other times it
> > varied in intensity (loudness) even within one sequence; fading in and out.
>
> > Regards,
>
> > Ty Ford
>
> > --Audio Equipment Reviews Audio Production Services
> > Acting and Voiceover Demoshttp://www.tyford.com
> > Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA
>
> Sounds like processor or display sound to me.
>
> Greg

I listened to most of the stuff just now on my centech cable tracer.
The only thing that comes close is the touch pad on my laptop. I check
two different phone types, iPad, bluetooth, wifi, etc. No tones out of
displays.

Greg

[g]

On May 15, 8:49*pm, G > wrote:
> On May 15, 8:22*pm, G > wrote:
>
>
>
>
>
> > On May 15, 9:41*am, Ty Ford > wrote:
>
> > > On Sat, 14 May 2011 17:05:38 -0400, Scott Dorsey wrote
> > > (in article >):
>
> > > > Ty Ford > wrote:
>
> > > >> I got a brand new interference sound I've never heard before today coming
> > > >> in
> > > >> on a mic during a session here.
>
> > > >>http://home.comcast.net/~tyreeford/cell.wav
>
> > > >> Has anyone heard this yet? What is it?
>
> > > > It's not a cellphone. *It doesn't sound like FSK data either.
>
> > > > By any chance were you recording near a paging system tower? *Old-style
> > > > paging services were on 30-50 Mhz band and sounded kind of like that.

[MarkK]

>
>
> It sounds to me more like a simple digital game sound effect. Or a ring
> tone.
>
> Steve King
>
>

Ty,

Did the client HAVE a cell phone regardless of if she thought it was on or
off?

Was it a GSM type cellphone by chance?

Mark

[Peter Larsen[_3_]]

G wrote:

> I keep thinking sounds like a sound sequence, since it fades out at
> the end.

Agree, and I wonder about it is an acoustic source in someones pocket or
electromagnetically induced into a cable or a mic, ie. possibly not at all
RFI.

> Greg

Kind regards

Peter Larsen

[Ty Ford]

On Mon, 16 May 2011 13:02:44 -0400, Peter Larsen wrote
(in article >):

> G wrote:
>
>> I keep thinking sounds like a sound sequence, since it fades out at
>> the end.
>
> Agree, and I wonder about it is an acoustic source in someones pocket or
> electromagnetically induced into a cable or a mic, ie. possibly not at all
> RFI.
>
>> Greg
>
> Kind regards
>
> Peter Larsen
>
>
>

We didn't hear it "in the air." When I muted that mic input (only using one)
the signal from the mic and the noise stopped.

She thought her phone was "dead off" and should know the difference.

She'll be coming back in a few weeks. I'll see if we have time to experiment

Thanks for everyone's thoughts. The special Eric Toline cable foiled it,
presuming it kept on going after I swapped out the mic cable.

Regards,

Ty Ford


--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA

[MarkK]

>
> We didn't hear it "in the air." When I muted that mic input (only using
one)
> the signal from the mic and the noise stopped.
>
> She thought her phone was "dead off" and should know the difference.
>
> She'll be coming back in a few weeks. I'll see if we have time to
experiment
>

was it a GSM type cellphone?

Mark

[Ty Ford]

On Mon, 16 May 2011 21:34:44 -0400, MarkK wrote
(in article >):

>
>>
>> We didn't hear it "in the air." When I muted that mic input (only using
> one)
>> the signal from the mic and the noise stopped.
>>
>> She thought her phone was "dead off" and should know the difference.
>>
>> She'll be coming back in a few weeks. I'll see if we have time to
> experiment
>>
>
> was it a GSM type cellphone?
>
> Mark

Don't know.

Regards,

Ty Ford



--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA

[Kevin T]

On May 17, 9:28*am, Ty Ford > wrote:
> On Mon, 16 May 2011 21:34:44 -0400, MarkK wrote
> (in article >):
>
>
>
> >> We didn't hear it "in the air." When I muted that mic input (only using
> > one)
> >> the signal from the mic and the noise stopped.
>
> >> She thought her phone was "dead off" and should know the difference.
>
> >> She'll be coming back in a few weeks. I'll see if we have time to
> > experiment
>
> > was it a GSM type cellphone?
>
> > Mark
>
> Don't know.
>
> Regards,
>
> Ty Ford
>
> --Audio Equipment Reviews Audio Production Services
> Acting and Voiceover Demoshttp://www.tyford.com
> Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA
I have to analyze all kinds of cell phone audio anomalies in my day
job for a major us provider. Its no rfi or dtmf I have ever
encountered. I think you can eliminate phones as the cause