That's what a driver does, create a longitudinal pressure wave in the air.
The pressure of the acoustic wave is the small variation relative to the
static atmospheric pressure. Like AC in linear circuits relative to the DC bias point.
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Like any other speaker? It doesn't pressurise the room as such, which is what he seems to be saying? I've only heard this term used when referring to subwoofers
Even the loudest sound only changes the static air pressure by a tiny bit.
He must mean making the audio pressure throughout the room as uniform as possible.
Good luck with that at low frequencies, no matter with how many woofers.
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SPL (Sound Pressure Level) applies to all loudspeakers and anything that makes a sound. The long wavelengths of sound produced by "subwoofers", <100 Hz, makes their behavior in small rooms problematic for placement because they are long enough to be equal to or multiples of room dimensions, causing reinforcements and cancellations (room modes and nodes) in various positions due to reflections being in or out of phase. By careful placement of one or more subs, the problem areas can be reduced, or at least be made better at the listening position.
The whole "pressure producing device" nomenclature he uses in the video does nothing to explain the problem or solution.
Thanks everyone, that all makes sense, I wondered if I was missing something.
Someone in the comments says "When the avg person hears you say Pressure, they don't equate that to sound...."
To which he replies "The term pressure is used for energy < 100 Hz. Pressure is felt not heard."
Which doesn't clarify things
Someone in the comments says "When the avg person hears you say Pressure, they don't equate that to sound...."
To which he replies "The term pressure is used for energy < 100 Hz. Pressure is felt not heard."
Which doesn't clarify things
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