公开(公告)号：US20210377652A1

公开(公告)日：2021-12-02

申请号：US16322463

申请日：2017-07-28

Applicant: Knowles Electronics, LLC

Inventor： Andrew UNRUH ,  Martin VOLK

IPC: H04R1/30 ,  G10K11/28 ,  B81B3/00 ,  G10K9/22

Abstract: An ultrasonic device includes a substrate, a transmitter disposed over the substrate, the transmitter including an ultrasonic transmitting transducer configured to generate ultrasonic signals, and a receiver disposed over the substrate, the receiver including an ultrasonic receiving transducer configured to sense ultrasonic signals. The ultrasonic device further includes a first horn-shaped acoustic channel, wherein a material of at least one portion of the first horn-shaped acoustic channel is the same as a material of at least one portion of the transmitter or the receiver.

公开(公告)号：US20170235434A1

公开(公告)日：2017-08-17

申请号：US15435173

申请日：2017-02-16

Applicant: Knowles Electronics, LLC

Inventor： Sarmad QUTUB ,  Martin VOLK

IPC: G06F3/043 ,  H04R19/04 ,  B06B1/06 ,  B06B1/02

CPC classification number: G06F3/0436 ,  B06B1/02 ,  B06B1/0292 ,  B06B1/06 ,  B06B2201/51 ,  B06B2201/55 ,  G06F3/0416 ,  H04R19/04 ,  H04R2201/003 ,  H04R2499/15

Abstract: An ultrasonic actuation apparatus includes a piezoelectric transducer producing a first ultrasonic signal; a second transducer; and a platen, the platen being directly and/or acoustically coupled to the piezoelectric transducer and the second transducer. The second transducer may be a MEMS microphone. The second transducer is configured to receive the first ultrasonic signal at a first time, and a second ultrasonic signal at second time. The second ultrasonic signal has been modified from the first ultrasonic signal in correspondence with an object being in contact with the platen.