Method for determining a wearing state of an earphone, and earphone system

A method for determining a wearing state of an earphone, comprising:

• acquiring acceleration data of the earphone using an acceleration sensor integrated in the earphone;
• ascertaining a time characteristic of the acceleration data, where a magnitude of the acceleration due to gravity is subtracted from a magnitude of the acceleration data;
• ascertaining curve segments from the time characteristic of the acceleration data, each of the curve segments being respectively formed by a first section and a second section immediately following the first section chronologically, wherein the first section and the second section each being defined by a curve of the acceleration data between two consecutive zero crossings of the time characteristic of the acceleration data;
• determining a first wearing state of the earphone, in which the earphone is worn on the ear, when the first section of a curve segment of the curve segments has a positive course and the second section of the curve segment has a negative course, and when the curve segment has a first characteristic shape;
• and
• determining a second wearing state of the earphone, in which the earphone is not worn on the ear, when the first section of a curve segment of the curve segments has a negative course and the second section of the curve segment has a positive course, and when the curve segment has a second characteristic shape.

An earphone system, comprising:

• an earphone including:
• (i) an audio module which is configured to output an audio signal, and (ii) a sensor device including an acceleration sensor which is configured to measure an acceleration of the earphone;
• and
• a processor device configured to induce the earphone to determine a wearing state of the earphone, by:
• acquiring acceleration data of the earphone using an acceleration sensor integrated in the earphone,
• ascertaining a time characteristic of the acceleration data, where a magnitude of the acceleration due to gravity is subtracted from a magnitude of the acceleration data,
• ascertaining curve segments from the time characteristic of the acceleration data, each of the curve segments being respectively formed by a first section and a second section immediately following the first section chronologically, wherein the first section and the second section each being defined by a curve of the acceleration data between two consecutive zero crossings of the time characteristic of the acceleration data,
• determining a first wearing state of the earphone, in which the earphone is worn on the ear, when the first section of a curve segment of the curve segments has a positive course and the second section of the curve segment has a negative course, and when the curve segment has a first characteristic shape, and
• determining a second wearing state of the earphone, in which the earphone is not worn on the ear, when the first section of a curve segment of the curve segments has a negative course and the second section of the curve segment has a positive course, and when the curve segment has a second characteristic shape.