It’s a well studied and understood issue/trade-off with HAs that use beam forming (fully directional mode) to help block out noise from behind and the sides in order to focus on sounds from the narrow beam in front. It’s been documented in research papers. The side effect/trade-off is the noticeable floor noise at the lower frequency spectrum, especially noticeable if it’s quiet.
I’ve had first hand experience with this myself on my OPN 1 when I put it in the Full Directional value instead of Open Automatic value in my Directionality Settings option when I tried out the beam forming option of my OPN 1. The OpenSound Booster and MoreSound Booster is basically that beam forming option, so it’s very understandable if you can hear the floor noise being louder the more you increase the boost.
But in Open Automatic, I don’t hear any floor noise anymore at the low frequencies because the OPN is now no longer in beam forming (fully directional) model.
What Directionality Settings value do you have set in your MoreSound Intelligence menu? If it’s being set to Full Directional, then you’ll hear the floor noise in quiet environments. It’s basically the same as enabling the MoreSound Booster. If it’s in Neural Automatic (like it should be) or Fixed Omni, then you should not hear the floor noise. So check it out to see if it’s set to Full Directional or not, and change in.
If you want it in Full Directional on occasions to help you focus on front speech, then use the MoreSound Booster instead so it’s only temporary and you can turn it off when you don’t need it anymore. But if you really want it to be set to ALWAYS be in Full Directional, then that’s a trade-off that you’ll have to live with. It’s not an Oticon only phenomena. It happens with all HAs. But it’d defeat your purpose to buy the More for the open paradigm if you force your More to always be in Full Directional.
Some of the more tradition HAs in the William Demant family like Sonic Enchant or Radiant, or the Philips HearLink, do give you an option to overcome this phenomena by suppressing the floor noise, but probably with some trade-off, probably at the expense of diminishing your low frequency gain or something like that.
Of course, this issue only affects folks who have good low frequency hearing (so they’d notice the low frequency floor noise) and only a ski slope loss. Folks with moderate to worse low frequency hearing wouldn’t notice this phenomena as much. In noisy environment, it’s probably loud enough that this floor noise is overwhelmed by the ambient noise that even folks with ski slope loss wouldn’t notice it. But in quiet environments and if the beam forming (fully directional value) is still on, then the ski slope loss folks would notice this floor noise. But you gotta ask yourself why you’d want to be in beam forming mode in quiet environments, especially if you own the More and subscribe to the open paradigm in the first place?
