mcrider007 said:
....but if I read your post correctly, you can still hear the human voice pretty good when standing in front of the speaker but are almost deaf if the voice is being transmitted electronically. Does that mean that we can estimate how good our overall hearing is by our ability to listen to a TV or radio?
The difference between live and recorded speed intelligibility is not this pronounced. I can follow most dialogue on TV fine and something like a newscast or sitcom is easy to follow. But many shows (e.g., an action dramas with complex plots) have a lot of background action/noise, the actors are involved in things where they don't speak clearly, many have odd accents, etc. - these are the situations where my ability to follow complex dialogue goes way down. And while I have little overt difficulty in engaging in live conversation, I'm sure I don't do as well as I used to.
TV and movie sounds systems are also highly variable in their frequency response curves. If I'm already 40-db down at 2.5K Hz, then a further drop of 20-db in the playback system tips it over the edge.
Here's one description of the problem: "Loss of high frequency hearing also can distort sound, so that speech is difficult to understand even though it can be heard. Hearing impaired people often have difficulty detecting differences between certain words that sound alike, especially words that contain S, F, SH, CH, H, or soft C, sounds, because the sound of these consonant is in a much higher frequency range than vowels and other consonants."
As an aside, I have an elderly father who was in the artillery so he is hearing impaired. A long time ago, I learned that when speaking to him, it was important to look at him directly as I talked. We all secretly become lip readers as our hearing diminishes.
Yes, I think if you're noticing more difficulty in following speech on TV, this is an early warning sign.
I can be preachy on this subject, sorry. But if I can convince even one person who is riding regularly now and thinks they don't need protection to start using it, I'll continue preaching. And I don't know anyone who has started using earplugs say they want to go back to no protection as riding is a lot more pleasant without all the racket.
- Mark