Driver Velocity

[schmeet]

Hi guys,

If i have the driver velocity Ud.
how can i work out the pressure level from that?

I'm guessing its gotta be something like

Ud * Sd * p * c

where
Ud = Driver Velocity
Sd = Cone Area
p = Density of air
c = Speed of sound

I'm not quite sure though, does anyone have any ideas?

Thanks
Pete


P.s.

I'm calculating Ud (in an infinite baffle) using:
Ud = Pg / ((1 / jwCas) + jwMas + Rat)

Where:
Pg = Acoustic Driving Pressure = (eg Bl) / (ReSd)
Cas = Acoustic Compliance = Vas / (pc^2)
Mas = Acoustic Mass (not too sure how to calculate this?) Maybe (1 / (fs^2 * Cas))

Rad = (Bl^2 / Sd^2) * (Qes / (Re * Qms))
Rat = Total Acoustic Resistance = Rad + (Bl^2 / (Sd^2 (Re + jwLvc)))

 

[bjorno]

Hi Pete,
Maybe this paper can give you a hint:

http://courses.ece.uiuc.edu/ece403/lectures and notes/lec11.070209.pdf

b