US 11,810,544 B2
Systems and methods for on ear detection of headsets
Brenton Steele, Blackburn South (AU)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Mar. 28, 2022, as Appl. No. 17/705,974.
Application 17/705,974 is a continuation of application No. 16/777,016, filed on Jan. 30, 2020, granted, now 11,322,131.
Prior Publication US 2022/0223137 A1, Jul. 14, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10K 11/178 (2006.01); H04R 3/00 (2006.01)
CPC G10K 11/17881 (2018.01) [H04R 3/002 (2013.01); H04R 3/007 (2013.01); G10K 2210/1081 (2013.01); G10K 2210/3028 (2013.01); G10K 2210/3226 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A signal processing device for on ear detection for a headset, the device comprising:
a first microphone input for receiving a microphone signal from a first microphone, the first microphone being configured to be positioned inside an ear of a user when the user is wearing the headset;
a second microphone input for receiving a microphone signal from a second microphone, the second microphone being configured to be positioned outside the ear of the user when the user is wearing the headset; and
a processor configured to:
receive microphone signals from each of the first microphone input and the second microphone input;
pass the microphone signals through a first filter to remove low frequency components, producing first filtered microphone signals;
combine the first filtered microphone signals to determine a first on ear status metric;
pass the microphone signals comprising signals from each of the first microphone input and the second microphone input through a second filter to remove high frequency components, producing second filtered microphone signals;
combine the second filtered microphone signals to determine a second on ear status metric; and
combine the first on ear status metric with the second on ear status metric to determine the on ear status of the headset.