US 12,216,752 B2
Personal authentication device based on echo sounds, personal authentication method, and recording medium
Takafumi Koshinaka, Tokyo (JP); Masahiro Saikou, Tokyo (JP); and Takayuki Arakawa, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Filed by NEC Corporation, Tokyo (JP)
Filed on Mar. 21, 2024, as Appl. No. 18/611,775.
Application 18/611,775 is a continuation of application No. 17/887,338, filed on Aug. 12, 2022, abandoned.
Application 17/887,338 is a continuation of application No. 16/333,776, abandoned, previously published as PCT/JP2017/032682, filed on Sep. 11, 2017.
Claims priority of application No. 2016-181897 (JP), filed on Sep. 16, 2016.
Prior Publication US 2024/0232311 A1, Jul. 11, 2024
Int. Cl. G06F 21/00 (2013.01); A61B 5/117 (2016.01); G06F 21/32 (2013.01); H04L 9/40 (2022.01); H04S 7/00 (2006.01); G07C 9/37 (2020.01); H04W 12/065 (2021.01); H04W 12/65 (2021.01)
CPC G06F 21/32 (2013.01) [A61B 5/117 (2013.01); H04L 63/0861 (2013.01); H04S 7/304 (2013.01); G06F 2221/2117 (2013.01); G07C 9/37 (2020.01); H04W 12/065 (2021.01); H04W 12/65 (2021.01)] 3 Claims
OG exemplary drawing
 
1. A personal authentication device comprising:
one or more memories storing instructions and registering a second feature amount; and
one or more processors configured to process the instructions to:
output a first acoustic signal to earphone, the first acoustic signal being signal for sound is transmitted from the earphone;
receive a second acoustic signal from the earphone, the second acoustic signal being signal based on echo sound being the sound echoed in an ear of the user;
calculate a first feature amount related to the user based on the second acoustic signal;
collate the first feature amount with the second feature amount; and
output a third acoustic signal being different from the first acoustic signal to the earphone based on a collation result, wherein
the one or more processors is configured to process the instructions to:
recognize the user as user authorized to use the earphone based on the collation result;
provide a service to the user when the collation result indicate coincidence;
when the collation result does not indicate the coincidence, providing of the service is stopped and the second feature amount registered within the one or more memories is deleted from the one or more memories; and
detect whether a specified time has passed,
when the collation result indicate coincidence and it is detected that the specified time has passed, the providing of the service to the user is stopped.