I’ve been testing a pair of Marvel 90s (rechargeable). My main complaint with them is that they recognize every pure tone as possible feedback and go into quick oscillation mode to squash it. This is what is creating the tremolo effect. I play guitar, and on the high, single notes, it’s impossible to listen to.
I had Connect Hearing (Phonak’s retail stores) tweak them to remove the “whistle reduction” from the program and set the mic to OMNI for when I play guitar. Shutting off the ‘whistle reduction’ (the feedback squashing algorithm) is what gets rid of the tremolo - but of course, then you are subject to a lot of feedback. I had her save this as a manual program, as the aids don’t recognize tones like these as music. It did the same thing with solo trumpet and anything that gets anywhere near a pure tone.
Under normal “Audiosense 3.0” operation, though, since the aids don’t recognize solo notes as music, they never shift into the music mode and as such, trill when those notes come along. As stated, the sound of the microwave, high pitched voices, certain bird noises, etc, create this tremolo/trill effect as you hear the aid trying to deal with feedback.
There is so much else to love about these aids, but if normal listening is so interrupted by their feedback reduction technology, I am afraid these aids won’t be something I can use. I am going to check out the Kirkland 9.0 aids at Costco - they are essentially the Marvel 90s without a rechargeable or telecoil option, and without the tinnitus management program. And, get this, they are $1499 a PAIR (vs Connect Hearing’s $6900 a pair)…I’ll see if a different technician can make them work better. If not, I’ve heard good things about Costco’s new Philips aids. Apparently, they’ve got the best feedback-reduction circuit on the market.
I will keep you posted.