Loudspeaker cone excursion estimation using reference signal

US9565505B2 · kind B2 · utility

Assignee

• Intel IP Corporation · US

Inventors

• Richard Ronig · Oberhausen, DE
• Markus Hammes · Dinslaken, DE
• Christian Kranz · Ratingen, DE

Key dates

• Filing date: Jun 17, 2015
• Grant date: Feb 7, 2017
• Expiry date: Jun 17, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04R2499/15
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The excursion of a loudspeaker cone is estimated using a reference signal in one example, a primary signal, produced by a cone of a loudspeaker, is received and a reference signal produced simultaneously with the primary signal by the loudspeaker cone is received. The reference signal causes an excursion of the loudspeaker cone that is amplitude modulated by the excursion caused by the primary signal. An amplitude modulation of the reference signal is determined and an excursion of the loudspeaker cone is determined using the determined amplitude modulation.