We maybe don't have the same scale to measure audio. What I find acceptable is “I hear the person just as well as if they were here”. Hearing is a continuum. W

We maybe don't have the same scale to measure audio. What I find acceptable is “I hear the person just as well as if they were here”. Hearing is a continuum. What the top 25% of hearing people consider OK quality is often what the lower 50% really struggles with, barely keeping up with the conversation. Even in same-room audio conditions, most people ask for something to be repeated at least once in half the conversations I witness. Any further degradation rapidly increases this statistic. And I bet there are cases where people don't bother asking.