US 12,407,994 B2
Hearing aid for placement at an ear of a user
Emilie Munk Haagerup, Smørum (DK); Peder Hesselbjerg Pedersen, København N (DK); Mads Buur Mortensen, Smørum (DK); and Johan Rosengren, Smørum (DK)
Assigned to Oticon Medical A/S, Smørum (DK)
Filed by Oticon Medical A/S, Smørum (DK)
Filed on Feb. 14, 2024, as Appl. No. 18/441,113.
Application 17/553,277 is a division of application No. 16/995,231, filed on Aug. 17, 2020, granted, now 11,323,831, issued on May 3, 2022.
Application 16/995,231 is a division of application No. 16/683,013, filed on Nov. 13, 2019, granted, now 10,848,884, issued on Nov. 24, 2020.
Application 16/683,013 is a division of application No. 15/980,074, filed on May 15, 2018, granted, now 10,516,954, issued on Dec. 24, 2019.
Application 18/441,113 is a continuation of application No. 17/553,277, filed on Dec. 16, 2021, granted, now 11,937,050.
Claims priority of application No. 17171091 (EP), filed on May 15, 2017.
Prior Publication US 2024/0305938 A1, Sep. 12, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04R 25/00 (2006.01)
CPC H04R 25/606 (2013.01) [H04R 25/554 (2013.01); H04R 25/60 (2013.01); H04R 2225/51 (2013.01); H04R 2225/67 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A bone-anchored hearing aid for placement on head of a user, the bone-anchored hearing aid comprising:
an external transmitter configured to be located on an outer surface of the head of the user, the external transmitter comprising:
at least one microphone configured to obtain ambient sound and convert the ambient sound to an electric signal,
a signal processor configured to process the electric signal for provision of a transmission signal,
a transmission coil configured to inductively communicate the transmission signal,
a skin engaging surface configured to apply friction to the head of the user, and
a first magnet;
an internal receiver configured for implantation in the head of the user, the internal receiver comprising:
a reception coil configured to inductively receive the transmission signal and to convert the transmission signal to an output signal;
a vibrator configured to output the output signal as a vibration which can be perceived as sound by the user; and
a second magnet configured to apply an attractive force to the first magnet, wherein the skin engaging surface comprises a series of protrusions.