Hi,
Are dustcaps on fullrange drivers like TC9 and SBAcoustics SB65WBAC25 pistonic?
Thanks and Regards,
WA
Are dustcaps on fullrange drivers like TC9 and SBAcoustics SB65WBAC25 pistonic?
Thanks and Regards,
WA
In theory it could break-up.
Being so small in diameter any likely breakup of a dustcap would be high enough to be beyond practical interest. Since both the inner and outer of the dustcap are moving at virtually the same distance, it will, in practice be pistonic over the frequency range of interest.
The main cone would be well broken up long before the dustcap gets affected.
Being so small in diameter any likely breakup of a dustcap would be high enough to be beyond practical interest. Since both the inner and outer of the dustcap are moving at virtually the same distance, it will, in practice be pistonic over the frequency range of interest.
The main cone would be well broken up long before the dustcap gets affected.
The problem is often behind the dustcap, in the cavity formed above the pole piece. So phase plugs or damping pads or porous dustcaps have been utilized to ameliorate the noise. I don't care for leaving the gap open to the environment so am inclined to apply damping to the cap and move on.
Were it not for cone breakup, the drivers we refer to as “full-range” would have usable output over a much narrower bandwidth. As most dustcaps in this class of drivers have relatively simple dome shapes - the FF -WK series being a very interesting exception - and are driven from their periphery, I’d imagine they’d be far less susceptible to audible breakup at frequencies within our perception.
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