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Phonak Spheric mode has long processing delay

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In reply to @tori.naess50

It doesn’t seem long, but my gap detection threshold (ability to detect a silent gap between two identical clicks versus hearing a single click) is under 2 ms. I’ve had some ridiculous special training, but most people still have a gap detection threshold under 5 ms. Between different sounds (rather than identical sounds) it goes up but can still be 10-20 ms. Age and hearing impairment also make it go up. But for people with very normal hearing in the lows (and therefore hearing aids) it is relevant.

Thank you! Actually, I was mainly replying to the post above mine referring to the delay being 15 minutes…

Sound in air travels about one foot per millisecond.
Many 5.1 channel home theater processors allow each loudspeaker delay to be adjusted in one millisecond increments.

In reply to @Xonic83

delay is negligible: I estimated it to be around 30mSec when testing with my Auracast transmitter. LE must be On though, or my connection resorts back to regular which has obnoxious delay.

In a typical crowd environment (my church), the delay from the live overhead PA speaker is the same as the Auracast delay, causing my HA live sound to be perfectly in sync with my HA Auracast feed. Adjusting the balance between the two only changes the apparent distance away the sound source is (due to live sound having room reverberance).

At home, the Auracast delay is perceptible because my home theatre speakers are only 10’ away. However, I found a workaround for that… I fudged my receiver setup to indicate that my subwoofer was an addition 22’ away from my L/R speakers. Thus, it added delay to the L/R speakers to compensate, which got Auracast in sync with the live audio.

You mention a sub, do you have an AVR? if so, how do you plug your TV streamer into that? I have a marantz with a 5.1.4 Atmos setup. I used to be able to hear it well back in the day, but I’ve been wondering how I get the sound out of the speakers and into the Phonak TV streamer at the same time. There are some aux outputs on the front that I might be able to route to, I was a sound engineer in a previous life so I’m sure I can find a way, just wondered what you did.

Mine is a Yamaha receiver with a 2nd zone output that can be sync’d to the main zone or have its own input source selection. I would think that a stereo line output would work too, although it may not work well when watching a Dolby Atmos 5.1.2 or 5.1.4 movie. I feed my with L/R and then add C to that with some resistors.

Yeah I have a 2nd zone, never tried using it and it would be a nightmare to get to the back of the amp so I am going to really really hope the RCAs on the front of it work. I wonder for me what’s faster the TV connector from Phonak orAurocast. Or maybe even Roger but that’s mono I thik.

In reply to @Tree

My audiologist set up a music program for me using “Dr. Chassin’s Checklist for Optimizing Your Hearing Aids for Music.” (I can’t seem to be able to paste the URL here.) It works great for my Phonak Spheres when playing guitar

What would happen running the same test on 10 different units? Asking about variability between units that are exactly the same.

One reason I ask is that the trial spheres I tried first worked fantastically well. The I bought, not so much.

Of course I don’t have 10 units to test with, but there is no reason to believe that there would be any differences.

I should check if different levels have different delays. However I only have the I70, so the max I can check is ‘moderate’.

Edited

Of course. I did not mean to imply you did or should.

My point is that the Phonak Sphere trials I used for a few weeks were amazing in noise. But not the ones I eventually bought. Quality control? Natural variation in manufacturing? Misperception on my part? Not sure.

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