In article , Keith G
wrote:

"Ian Iveson" wrote


OTOH, doesn't a horn rather slow things down?


Oh dear, that is usually a cue for one or two here to drag the old 'it's
not a proper horn' chestnut out but no, quite the opposite.

In principle, if a horn couples energy from the cone movement into the air
more efficiently it could cause any cone resonances to die away more
swiftly. So in one sense quite the opposite of "slow things down". But as
usual, the snag is that reality isn't so simple. For example, the horn
structure itself may pick up a lot of energy from the cone/air movements
and have resonances which then take time to dissipate. In effect, you then
may reduce some cone problems in exchange for other - possibly more serious
ones - with the 'horn' structure.

Slainte,

Jim

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