Moving the sweet spot
I was just walking behind my sweet spot chair, and I had noticed that I can hear more of the high frequency, just before I arrive in the center of the listening position, then I move back and forth to pinpoint the place. Then I move my chair at that new spot, one foot farther back, one foot to the right, the chair pointing between the middle of the speakers. So, It seems that if I am sitting at the sweet spot, there is a high frequecy cancellation. My room is an open space, and my left ear is not as good as I was young.
This is tech talk. Map out your room modes and it will be obvious that cancellation only happens at certain locations that vary by frequency. What happens is the waves reflect off the walls, come back and where they meet they either cancel or reinforce. This happens all the time everywhere, but really is only audible in rooms with almost all smooth unbroken walls. Because otherwise the waves hit uneven surfaces, bounce off in different directions, and the result is the reflections become diffuse. Which is why surfaces deliberately designed to do this are called diffusers. This never happens in as you say "an open space". So we can cross that one off the list and we are left with, "and my left ear is not as good as I was young." |
millercarbon, I think you are right, it happens for most every one of us... with the age. Thank you |
