I only have tested it with 2 mounts and it workd with 450ms mute time and sound at 0.
Also tested with sound = 25%, worked as well.
Nopt sure which mounts you got and test it with, I do not own all. Only have like 2 that "are louad" as you mount and these were handled fine with 450ms time. But I also set it to SFX sound = 0 then to mute it in total as I do not need to hear the loud noises at all there