User`s manual

Table Of Contents
13.7.3 GLOSSARY OF SYMBOLS
F
S
Resonant frequency of driver including air load
V
AS
Volume of air having the same acoustic compliance as driver
suspension
R
E
DC electrical resistance of voice coil
Q
MS
Q of driver at Fs considering mechanical losses only
Q
ES
Q of driver at Fs considering electrical resistance only
Q
TS
Q of driver at Fs considering all driver losses
B·l Motor strength, product of B times l
dB
SPL
Acoustic pressure produced by the driver at 1m when driven
driven by 2.83 V
S
D
Effective surface area of the driver cone
C
MS
Mechanical compliance of driver suspension
M
MS
Mechanical mass of driver cone assembly including air load
R
MS
Mechanical resistance of driver suspension losses
C
AS
Acoustic compliance of driver suspension
M
AS
Acoustic mass of driver cone assembly including reactive air
load
R
AS
Acoustic resistance of driver suspension losses
C
MES
Electrical capacitance representing the driver total moving
mass
L
CES
Electrical inductance representing the driver mechanical
compliance
R
ES
Electrical resistance representing the driver mechanical losses
R
AT
Total acoustic resistance of driver
R
MT
Total mechanical resistance of driver (suspension losses +
electrical reflected)
M
MD
Mechanical mass of driver cone assembly excluding air load
Z
MIN
Minimum impedance in the frequency range above Fs
Z
MAX
Impedance at Fs
Z
AVG
Average of impedance modulus over the measured frequency
limit
sη
0
Efficiency
L
1kHz
Inductance at 1kHz
L
10kHz
Inductance at 10kHz
13 MEASURING IMPEDANCE AND T&S PARAMETERS 193