换能器参数
Transducer Parameters
Small Signal Lumped Parameters
- Resonance frequency fs
- Mechanical quality factor Qms
- Electrical quality factor Qes
- DC resistance Re
- Force factor Bl(x=0)
- Mechanical resistance Rms(v=0)
- Stiffness Kms(x=0) and compliance Cms(x=0)
- Additional Thiele-Small parameters (e.g. Vas)
- Visco-elastic parameter (creep factor λ)
- Lossy inductance parameters (Wright, Leach, LR2 model)
Transducer Nonlinearities (Curve Shape)
- Force factor Bl(x) versus displacement x
- Mechanical compliance Cms(x) versus displacement x
- Mechanical stiffness Kms(x) versus displacement x
- Incremental stiffness Kinc(x) versus displacement x
- Inductance L(x,i) versus displacement x and current i
- Mechanical resistance Rms(v) versus velocity v
- Force-deflection curve F(x)
Single-valued Nonlinear Parameters
- Voice coil offset Xoffset
- Suspension asymmetry Ak
- Maximal peak displacement Xmax
- Force factor limited peak displacement Xbi
- Suspension limited peak displacement Xc
- Inductance limited peak displacement XL
- Stiffness Kms(x=0) at the voice rest position
- Force factor Bl(x=0) at the voice coil rest position
- Effective stiffness related to effective resonance frequency
- Symmetry point xsym in force factor curve
Electrical Impedance
- Amplitude and phase response
- Nominal electrical impedance Zn
- Impedance measured by using a large signal model
Parameters of the Enclosure
- Port resonance fb
- Quality factor Qlb of vented enclosure