Regarding the use of the Sennheiser RS195 headphones by people with mild to moderate hearing loss, which Sennheiser state to be an intended use.
I have a pair of RS140 headphones (analogue) which I have successfully used for a number of years. They have a balance control and are enclosed, which eliminates sound bleed which I know would annoy my wife.
After researching the improvements made to Sennheiser headphones I decided to purchase a pair of RS195s, even though they cost £350, as they matched all of my requirements
I set up the 195s and tried them out. They are certainly far better that the 140s and in 'isolation' provide a great listening environment, however there is one MAJOR problem.
Generally my wife and I watch television together, I suspect this is not an uncommon occurance. What this means is that the TV sound is on, not a loud level, as my wife has excellent hearing. But even at low levels this results in a very evident and distracting effect due to the digital delay of the 195s. It sounds a bit like a distracting echo, which actually makes the listening experience far worse than the RS140s.
I have tried using the analogue and optical outputs on the TV and have also used the output of other sound sources, but the result is of course the same. I've even checked the external audible sound heard through both the 140s and 195s with them switched off, just in case the level of isolation provided by the 195s is responsible, but they appear to be exactely the same.
Lip sync adjustment is a way of eliminating the effect of digital delay but it's only provided on audio equipment that connects to a TV, not on the TVs themselves, why would it be?
I have spoken with Sennheiser regarding this and they are investigating, but to be honest I cannot see a way of overcoming the delay.
So be aware, if you are tempted to buy a pair of headphones that employ digital wireless transmission, take into consideration that this effect will, in all probability, spoil your listening enjoyment.
If anyone can suggest a workable remedy, which does not employ the use of a bucket, I would be extremely pleased to hear it.
Many thanks Noel.