"Scott Dorsey" wrote in message

Arny Krueger wrote:

I've got two years of physics, an undergraduate degree in
engineering and completed most of my MSE except for my thesis
project (wife's pregnancy ended that). I've also measured it quite
conclusively in the lab. I've been reading papers about it for like
30 years in the JAES and JASA. Yes, I think that Doppler distortion
exist in speakers, but no I don't think it is a serious issue. In
contrast the AM distortion in speakers is a very serious, audible
issue.

This is a reasonable assessment of the situation. The thing about
doppler modulation, though, is that it's really interesting and the
math is a lot of fun. Not like typical AM distortion from amplitude
nonlinearities, which is dull, even if it's a more significant
problem. So I think folks should continue investigating doppler
distortion because it's an interesting problem even if not a terribly
important one.

Thanks, Scott. The other thing about Doppler is that it is in some sense
irreducable, and even something that modern speaker development trends seem
to want to increase.

Some of my informants argue that in fact speakers are about as linear as
they ever will be, and that the only remaining approach is to make them
cheaper, smaller, and put their nonlinearities where they won't sound so
objectionable.

This whole discussion traces back to another discussion on another audio
groups about a month ago. My opponent in that discussion seems to have
considerably changed his position in the past month in a good way, but he
still abuses my name. So goes life!

Arny Krueger wrote:

Some of my informants argue that in fact speakers are about as linear as
they ever will be, and that the only remaining approach is to make them
cheaper, smaller, and put their nonlinearities where they won't sound so
objectionable.

If speakers are as linear as they ever will be, I'm giving up this whole
industry and going out to listen only to live music. If this is as good
as it gets, it's a total waste.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Scott Dorsey" wrote in message

Arny Krueger wrote:

Some of my informants argue that in fact speakers are about as
linear as they ever will be, and that the only remaining approach is
to make them cheaper, smaller, and put their nonlinearities where
they won't sound so objectionable.

If speakers are as linear as they ever will be, I'm giving up this
whole industry and going out to listen only to live music. If this

I'm almost with you, Scott.

If speakers are as linear as they ever will be, I'm giving up this whole
industry and going out to listen only to live music. If this is as good
as it gets, it's a total waste.

If you're talking about simple harmonic and IM distortion, I'm inclined to agree
there isn't much room for improvement. But there is great room for improvement
in other areas.