The SA5000 is a scary monster; hearing pulsing static at 1 second intervals

[halcyon]

It could be a case of physiological self-noise, just as you have described.

With headphones there is a loss of treshold sensitivity 6-10 dB when hearing headphones. This is due to increased level of bodily self-noise, which can mask other signals.

It is not uncommon for me to hear my pulse when wearing some headphones. Sometimes even without any.

I don't know why you hear it with SA5000 and not with HD-600.

Also, you describe it as 'static' which isn't how I would describe the sound of self-noise as I hear it, so I'm not totally sure your case is actually physiological self-noise.

However, noise being in-sync with your own pulse is a relatively good indicator.

 

[Veniogenesis]

Yeah, it doesn't happen with any of my other headphones. The static sounds very much like clipping and are actually prolonged instead of short. As in, it's not short like "beep" but longer like a "buzz". Heh. So insane.

 

[Citizen Z]

You guys know that some drivers can actually pick up and play radio by them selves, right? Drivers are kinda crazy some times. Do a google. I'm pretty sure its AM radio waves that will produce this effect.

http://www.gi.alaska.edu/ScienceForum/ASF12/1221.html

 

[Alex M]

Quote:

Originally Posted by halcyon I don't know why you hear it with SA5000 and not with HD-600.

SA5000 have hard plastic surface inside that may lead to the echo chamber effect. HD650 have softer surface that would prevent sound reflection.

 

[ZOKROX]

Seriously.

Have a medical person check your blood pressure (too high?). An increase in
blood pressure might cause some people to hear their pulse under
unusual circumstances. Maybe this is one of them.

What happens if you increase your pusle rate, say after aerobics
exercise or jogging in place?

 

[Veniogenesis]

Double post. Argh, my first one. Noooooes.

 

[Veniogenesis]

Quote:

Originally Posted by ZOKROX Have a medical person check your blood pressure. An increase in blood pressure might cause some people to hear their pulse under unusual circumstances. Maybe this is one of them.

Bah. I would have never imagined a 17 year-old 137 pound male would need to worry about blood pressure. But it happens from what I've studied in biology classes. Time to be worried?

Quote:

What happens if you increase your pusle rate, say after aerobics exercise or jogging in place?

Hmm, good idea. I'll try this later.

 

[MdRex]

ACtually if you feel close enough, you can feel a pulse just in front of the year of the side of your face.

 

[Veniogenesis]

Quote:

Originally Posted by MdRex ACtually if you feel close enough, you can feel a pulse just in front of the year of the side of your face.

Yep. I did a little bit of research earlier today, and there are actually two pulse points on the side of the face.

The Superficial Temporal and the External Maxillary. What is scaring me is how the SA5K is able to pick up these pulses and making static with it. And why is only the right side?

 

[redshifter]

my guess is you're hearing noise-type pressure induced tinnitus. perhaps the sonys are pressing on your pulse-points in such a way that blood flow is restricted to the point where it translates into this form of tinnitus, in time with your heartbeats.

 

[xand1x]

Quote:

Originally Posted by fewtch P.S. don't think you're insane, unless you start hearing ghosts of dead people, or voices telling you to cuss the head-fi moderators out or something like that .

hahahahahahhahahaha

 

[firefox360]

Quote:

Originally Posted by redshifter my guess is you're hearing noise-type pressure induced tinnitus. perhaps the sonys are pressing on your pulse-points in such a way that blood flow is restricted to the point where it translates into this form of tinnitus, in time with your heartbeats.

Either that or your heart is causing major EMF! Might be a good time to step away from those amplifiers!

 

[Jahn]

This is so Edgar Allen Poe. You typed this thread in a month too late!

Anyhow, with my DT770s I can totally hear the internal swishings of blood pulsing through my ears, it's just a sealed can thing. I thought I had tinnitus the first time I heard it, I freaked out lol! But with open cans like the Grados, I hear nothing of the sort.

The scary thing is, the SA5K is an open can, so for you to hear that...the only thing i can think of is that the iron in your blood is magnetically charged and is pumping some nice tunes to one of your drivers. (I never said I was a doctor!)

 

[gerG]

My guess is that the bottom of the pad is sitting on your carotid artery and picking up your pulse. If it puts pressure on that point, you will hear the blood flow through the restriction loud and clear. The SA5000 actually have a paper liner in them that might tend to amplify the noise, just like a dixie cup with a string.

Try lifting the bottom of the pad off your neck on that side.


gerG

 

[b0dhi]

Just to eliminate the obvious, have you tried switching the phones around? I'm not sure if the pressure points are symmetrical around the head, but it's strange for you to be getting the same effect after taking them on and off so many times. I've had a similar effect of reverberating pulse except by lying on a pillow, and it wasn't easy to get up and lay back down and get the effect back again.