公开(公告)号：US20140157904A1

公开(公告)日：2014-06-12

申请号：US13794417

申请日：2013-03-11

Applicant: APPLE INC.

Inventor： David Amm ,  Henry Yang ,  Matthew Emanuel Last

IPC: G01B17/00

CPC classification number: B06B1/0292 ,  G01B17/00 ,  G01S7/521 ,  G01S15/74 ,  H04R2201/003

Abstract: Ultrasonic transmitters that can be used for ranging in mobile devices are disclosed. In some examples, an ultrasonic transmitter device can be configured to transmit ultrasonic signals in multiple frequency bands. The transmitter can include multiple sets of ultrasonic transmitters, each capable of transmitting in a different frequency band. In other examples, frequency-adjustable ultrasonic transmitters can be used. The transmitters can be configured to change one or more of a length, mass, or tension of a membrane to change a resonant frequency of the membrane. In some examples, the transmitter can include a non-uniformly shaped membrane capable of vibrating at more than one resonant frequency. The ultrasonic transmitters can be included within a housing configured to control the flow of air within and out of the housing. The transmitter membrane can further be formed on a patterned substrate configured to increase the sound pressure levels produced by the transmitter.

Abstract translation: 公开了可用于移动设备中的测距的超声波发射机。 在一些示例中，超声发射器设备可被配置为在多个频带中发射超声信号。 发射机可以包括多组超声波发射机，每组超声波发射机能够以不同的频带进行发射。 在其他示例中，可以使用频率可调超声波发射器。 发射器可以被配置为改变膜的长度，质量或张力中的一个或多个以改变膜的共振频率。 在一些示例中，发射器可以包括能够以多于一个谐振频率振动的非均匀形状的膜。 超声波发射器可以被包括在被配置成控制壳体内和外部的空气流动的壳体内。 发射器膜可以进一步形成在被构造成增加发射器产生的声压级的图案化衬底上。