[isw]

In article
,
RichD wrote:

This may be a dumb question, I never studied acoustics....

If you look into the wrong end of a telescope,
everything looks reduced, 'anti-magnified'.
Is there anything analogous acoustically?

In both cases, the phenomena is described
by wave equations -

There are various sorts of acoustic lenses, and horn-based loudspeakers
are not uncommon. Many speaker systems make use of interference effects,
too -- some, to their detriment, because the "designers" didn't
understand what they were doing ...

Isaac