公开(公告)号：US09813812B2

公开(公告)日：2017-11-07

申请号：US14569182

申请日：2014-12-12

Applicant: Analog Devices Global

Inventor： Kim Spetzler Berthelsen ,  Miguel Alejandro Chavez Salas ,  Kasper Strange

IPC: H03G11/00 ,  H04R3/00 ,  H03G9/00 ,  H03G9/02 ,  H04R29/00

CPC classification number: H04R3/007 ,  H03G9/005 ,  H03G9/025 ,  H04R29/001 ,  H04R2430/03

Abstract: The present application relates in one aspect to a method of controlling diaphragm excursion of an electrodynamic loudspeaker. The method comprises dividing the audio input signal into at least a low-frequency band signal and a high-frequency band signal by a band-splitting network and applying the low-frequency band signal to a diaphragm excursion estimator. The instantaneous diaphragm excursion is determined based on the low-frequency band signal. The determined instantaneous diaphragm excursion is compared with an excursion limit criterion. The low-frequency band signal is limited based on a result of the comparison between the instantaneous diaphragm excursion and the excursion limit criterion to produce a limited low-frequency band signal which is combined with the high-frequency band signal to produce an excursion limited audio signal.