The rocking behavior of the diaphragm is a severe problem in headphones, micro-speakers, and other kinds of loudspeakers causing voice coil rubbing that limits the maximum acoustical output at low frequencies. The root causes of this problem are small imbalances in the distribution of the stiffness, mass, and force factor in the gap. Based on lumped parameter modeling, modal decomposition and signal flow charts presented in a previous paper (Part 1) this paper focuses on the practical measurement using laser vibrometry, parameter identification, and root cause analysis. New characteristics are presented that simplify the interpretation of the identified parameters. The new technique has been validated by numerical simulations and systematic modifications of a real transducer. The diagnostic value of the new measurement technique has been illustrated on a transducer used in headphones
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.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
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.
