Google Inc.

Apple Inc.

Michael Asfaw

Chad Georges Seguin

David C Breece, Iii

Christopher R Wilk

Scott P Porter

Anthony P Grazian

Hongdan Tao

Leonardo Kusumo

Lawrence K Lam

Leng Ooi

Vivek Saini

David C Breece Iii

Lawrence Lam

Techniques, methods, systems, and other mechanisms for measuring the excursion of a speaker while being actively driven. Measuring excursion can involve attaching a flexible printed coil (FPC), including a sense coil, to the speaker, and monitoring an induced current as produced though the sense coil, and further detecting that violation of an excursion limit for the speaker may likely occur.

Inductive excursion sensing for audio transducers

A speaker assembly including a frame and a magnet assembly positioned within the frame. The magnet assembly may include a magnet and a top plate. The assembly further including a sound radiating surface suspended over the magnet assembly. The sound radiating surface includes a flexible circuit. A suspension suspending the sound radiating surface over the magnet assembly is further provided. The suspension may be over molded to the sound radiating surface and the frame. A voice coil extends from a bottom side of the sound radiating surface and electrically connects to the flexible circuit.

Speaker with flex circuit acoustic radiator

Embodiments disclosed in the present disclosure relate to vibration transducers. Such a transducer includes an electromagnet having a conductive coil. The conductive coil is configured to be driven by an electrical input signal to generate magnetic fields. The transducer further includes a magnetic diaphragm that is configured to mechanically vibrate in response to the generated magnetic fields. Additionally, the transducer includes a pair of cantilevered arms formed from damping steel. The cantilevered arms couple the magnetic diaphragm to a frame. The magnetic diaphragm vibrates with respect to the frame when the electromagnet is driven by the electrical input signal. Additionally, the pair of flexible support arms are connected to opposing sides of the magnetic diaphragm.

Damping spring

A computing device may include a multi-functional port in a base housing of the device. The multi-functional port may include an audio input device that can receive and process external audio input signals through an opening in the base housing. The multi-functional port may include a light source that can output light through the opening in the base housing. The multi-functional port may include a microphone boot. The microphone boot may guide external audio input signals into to the audio input device for processing. The microphone boot may also guide light, emitted by the light source, out of the base housing.

Combined microphone and lighting device and computing device having same

A bone conduction transducer includes a yoke having a pair of arms, a layer of high permeability steel on a surface of the yoke between the arms, a metal coil, a metallic post that extends into a center portion of the metal coil, a diaphragm, an anvil attached to a surface of the diaphragm, a pair of permanent magnets attached to an opposite surface of the diaphragm, and a pair of springs. A first end of each spring is attached to a respective one of the arms of the yoke, and a second end of each spring is coupled to the diaphragm. The diaphragm is configured to vibrate in response to a signal supplied to the metal coil. The diaphragm, anvil, and/or metallic post could be formed from a high permeability steel.

Bone conduction transducer with increased low frequency performance

An embodiment discloses the present disclosure includes a transducer having a yoke. The yoke includes a pair of arms. The yoke further includes a layer high permeability steel located between the pair of arms. The yoke also includes a metal coil wrapped around a post located at a central location on the layer of high permeability steel. The apparatus also includes a pair of permanent magnets attached to the single layer high permeability steel, where the permanent magnets each flank the post. The apparatus further includes a pair of springs, each includes a first end and second end, where the first end of each spring is attached to one of the respective arms. Yet further, the apparatus includes a diaphragm coupled to the second end of each spring configured to vibrate in response to a signal supplied to the metal coil.

Composite yoke for bone conduction transducer

An example method may be performed by a wearable computing device (WCD) that includes a bone conduction transducer (BCT). The method includes providing, to the BCT, an input signal that represents audio content. The method further includes sensing a time-varying voltage of the input signal and a time-varying current of the input signal. The method further includes determining an operating mode based on the time-varying voltage and the time-varying current. The method further includes processing the audio content according to the determined operating mode and using the processed audio content to continue providing the input signal to the BCT.

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Mountain View, CA, United States of America

Michael Asfaw