Re: Can't Hear myself during QC35 Phonecall
Sidetone is the effect of sound picked up by the microphone transmitter and instantly introduced at a low electronic signal level into the receiver (earphones). More simply, it is the sound of a speaker’s voice as received at his or her own ears through the headset. This is a very old technology but a very important feature for phonecalls using headphones that have active noise cancellation (ANC). The point of ANC is that it filters out all sounds that aren't part of the signal being broadcast into the headphones--So you hear your music but not the noise. Of course your own voice is an outside noise that (without sidetone) would not be part of the signal being broadcast into your headphones. Thus it would be muffled by the ANC just like other outside noises. This is not a problem when you are just listening to music. But if you are trying to have a telephone conversation, you don't want your own voice to be muffled. That would lead you to speak too loudly (like a partially deaf person) and be a little disorienting because your own voice sounds wrong in your ears. Sidetone is the feature that fixes that by picking up your voice from the microphone and putting it back into your own ears through the speakers, bypassing ANC. That way you hear yourself. It is the feature that enables ANC headphones to be viable for telephone calls. And it is a feature that Bose avertises the QC35 as having. The fact that the feature is not working for everyone is the reason we have this thread.