AES Journal Forum

An Added-Mass Measurement Technique for Transducer Parameter Estimation

Document Thumbnail

This report presents a methodology to measure transducers using a dual-added-mass technique in order to extract the motional impedance ZM(w) and force factor Bl from the total impedance. The method is more accurate than the classical single-added-mass approach insofar as the blocked electrical impedance can be completely filtered out of the total impedance. The methodology is suitable for determining moving mass and compliance in motional impedance models that include viscoelasticity and frequency-dependent damping. It is applicable to transducers for which adding mass to the moving parts is possible without introducing significant artifacts. A mass-consistency test is described to provide an internal validity check for the impedance fitting process. This test is quite stringent and provides an objective measure of the quality of the fit to the measured impedance. The quality of the proposed measurement technique was verified with an ANOVA Gage R&R measurement system analysis.

JAES Volume 65 Issue 12 pp. 1005-1016; December 2017
Publication Date:

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

RSS Feed To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.

AES - Audio Engineering Society