Bluetooth, I hear noise

[Thomas savage]

i recently bought a pair of Bose noise cancelling headphones , they can be used wired or via Bluetooth.

Apone using the wireless method I noticed 'noise' straightaway being transmitted by the phones when no music was being played. Sounded like 'processing' noise, computer like... subsequently I used them wired and comparing both connection methods with a musical program subjectivity I feel wired sounds best along with it being silent with no musical program .

What's going on here then? I had no expectation of noise with the wireless option and was thusly surprised to hear it.. what am I hearing and why?

 

[amirm]

I can explain the fidelity issue which is due to lossy codec that is used due to limited bandwidth of (standard) Bluetooth. There are better profiles that support better codecs but I suspect your Bose must be using the default codec. As an aside, the Bluetooth committee asked for a free codec and only Philips stepped forward with their codec and that is what got selected.

 

[RayDunzl]

Maybe it's the noise cancelling part making noise.

Can you turn off that function?

 

[Thomas savage]

Maybe it's the noise cancelling part making noise.

Can you turn off that function?

No, I don't believe you can.. however I presume the noise cancelling element is engaged when utilising the wired configuration and there is no noise then.

Maybe the noise cancelling and Bluetooth combined . TBH Iv heard similar noise when using wireless before as I now remember. With the chord Hugo, clearly there was this computer noise when using that wirelessly too.

I'd forgotten all about that.

 

[amirm]

Noise like that is common in poor analog+digital implementations but I didn't think Bose was in that category. Bluetooth is a digital transmissions system so I don't expect it to be noisy like other RF wireless analog systems.

 

[SPFC]

I have the wired only version of Bose's noise cancelling headphones, which are great for airplane traveling. However, there is always a hissing noise when the noise cancelling feature is turned on. It is hard to hear it in a noisy airplane, but easy to hear in a quiet environment.