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Micro Suspension Part Measurement (MSPM)

Features and Benefits

Specification of suspension parts
Optimal driver design in R&D
Defining mechanical limits
Measurement of the nonlinear stiffness K(x) of bare membranes without attaching to a loudspeaker
for:
- Suspension parts of micro speakers, headphones, tweeters and microphones
- Small membranes (diameter <7cm)

The Micro Suspension Part Measurement (MSPM) is designed for the measurement of the small and large signal parameters of small diaphragms and suspension parts as found in micro speakers, headphones, tweeters or microphones. The part is glued or clamped onto a DUT carrier plate and clamped onto a sealed pressure chamber. The diaphragm is deflected by the sound pressure generated by a sensitive midrange transducer. The linear parameters resonance frequency, Q-factor, stiffness/compliance, moving mass and mechanical resistance are determined dynamically by a simultaneous measurement of displacement and sound pressure.The nonlinear suspension characteristics are additional measured in the large signal domain.

Demo Video (Introduction)

Specifications

C11 MSPM Pro
C10 MSPM Lite
A12 MSPM Bench

Module Overview - Moving Parts Measurement

MSPM Pro and MSPM Lite

MSPM Lite
Measurement of resonance frequency & Q-factor and identification of linear parameters

Stiffness/compliance
Moving mass
Mechanical resistance R

MSPM Pro
All features of MSPM Lite
Additional feature: measurement of the nonlinear stiffness K(x) and compliance C(x)

MSPM Bench

The MSPM Bench is a small pressure chamber designed to produce high sound pressures. It is used to pneumatically excite a clamped small diaphragm passively to monitor its vibration behavior. A sealed outlet is provided to measure the sound pressure inside the chamber with a ¼ inch microphone.