Quote:
Originally Posted by computerpro3
The Bose headphones are not high sensitivity drivers (in an electrical sense). That is why you don't hear the noise with them.
If you had high sensitive headphones, you would most certainly be able to hear the noise (at least while watching video on the phone).
It's easiest to hear while watching something with no background music but dialogue - I noticed it first on Family Guy.
If you're into bass, you should check out the Beyerdynamic DT770 (80ohm) headphones. You won't want to wear them out and about (they are ugly compared to the Bose headphones) but the sound is in a completely different league. You'll be amazed!
What headphones do you use?
As I said, this noise is not heard even with all high end headphones (though it should be with almost all high end IEM's). The problem comes when driving high sensitivity (in an electrical sense) headphones.
Well this is not the typical snake oil stuff here. At least while watching movies, any idiot off of the street could hear it. It's a rhythmic, obvious, irritating noise.
You know what it sounds exactly like? If anyone of you build computers, do you remember what old onboard soundcards sounded like? IT sounds like the onboard sound of a 8 year old $30 motherboard while the computer is accessing the hard drive. It's that same rythmic chirping sound.
For reference, my Super.fi Pro 5's have a rather high 119 dB sensitivity rating and an impedance of 21 Ohms.
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HAHA! I know exactly what you mean by the old mobo and audio pci cards. The cheaps on were annoying! I have the exact same problem now tih my PC too. And its not the PC or audio card but rather the cheap 10 USB powered speakers I bought off Frys Electronic. WHen I do 3d modeling and I am rotation 3d object with a heavy poly count, I get the rhythmic noise you talk about. Also at bootup is audible. ANd the causa is obvious, cheap speakers with terrible shielding.