Systems and methods for assessing the visual acuity of person using a computerized consumer device are described. The approach involves determining a separation distance between a human user and the consumer device based on an image size of a physical feature of the user, instructing the user to adjust the separation between the user and the consumer device until a predetermined separation distance range is achieved, presenting a visual acuity test to the user including displaying predetermined optotypes for identification by the user, recording the user's spoken identifications of the predetermined optotypes and providing real-time feedback to the user of detection of the spoken indications by the consumer device, carrying out voice recognition on the spoken identifications to generate corresponding converted text, comparing recognized words of the converted text to permissible words corresponding to the predetermined optotypes, determining a score based on the comparison, and determining whether the person passed the visual acuity test.

One of the main objects of the present invention is to provide a speaker with optimized overall acoustic performance. To achieve the above-mentioned object, the present invention provides a speaker including: a base with an accommodation cavity; a vibration sounding assembly accommodated in the accommodation cavity, including a first diaphragm and a second diaphragm, and a driver fixed to the first diaphragm for driving the first diaphragm and the second diaphragm to vibrate and produce sound. The second diaphragm stacks on the first diaphragm, and a stiffness of the second diaphragm is different from a stiffness of the first diaphragm.

Various embodiments of the present disclosure are directed towards an integrated circuit (IC) chip in which a pad barrier layer caps a pad of a piezoelectric device. The pad barrier layer is configured to block hydrogen ions and/or other errant materials from diffusing to the piezoelectric layer. Absent the pad barrier layer, hydrogen ions from hydrogen-ion containing processes performed after forming the pad may diffuse to the piezoelectric layer along a via extending from the pad to the piezoelectric device. By blocking diffusion of hydrogen ions and/or other errant materials to the piezoelectric device, the pad barrier layer may prevent delamination and breakdown of the piezoelectric layer. Hence, the pad barrier layer may prevent failure of the piezoelectric device.

Disclosed is a method for increasing a perceived loudness of an audio data signal comprising the steps of obtaining a first digital audio data signal; determining at least one temporal amplitude peak in the first digital audio data signal; generating a second digital audio data signal by reducing the at least one temporal amplitude peak in the first digital audio data signal based on a predicted perceptual difference model representing a predicted perceptual difference between the first digital audio data signal and a peak reduced version of the first digital audio data signal; and generating a third digital audio data signal by amplifying the second digital audio data signal so that a peak of the second digital audio data signal has a predetermined signal value, wherein a perceived loudness of the third digital audio data signal is larger than a perceived loudness of the first digital audio data signal.

A hybrid input networked subwoofer includes a traditional line-in analog audio input for receiving analog audio content from non-networked audio source devices together with wired and/or wireless network interfaces for receiving digital audio content from one or more networked audio devices.

A micrometric speaker includes a frame, an electromechanical transducer, and a mechanical-acoustic transducer comprising a rigid plate movably mounted in the frame. The electromechanical transducer comprises two piezoelectric actuators and two elastic strips. The frame comprises a central crossmember from which the two strips extend until engaging two lateral coupling edges of the mechanical-acoustic transducer, and the mechanical-acoustic transducer comprises two linearising springs each extending from one of the lateral edges to the rigid plate, to enable, during a deformation of the strips, a movement of the two lateral edges to the central crossmember and reduce the longitudinal constraints applied to the strips during their deformation due to their “recessed-guided” bending configuration.

A display panel according to an embodiment of the present disclosure includes a flexible organic electroluminescent panel, and one or a plurality of piezoelectric films provided on a rear surface of the organic electroluminescent panel and vibrating the organic electroluminescent panel as a flat speaker.

The invention relates to a method for adapting the applied volume gain in an amplifier controlling at least one loudspeaker of an enclosure according to the desired volume gain selected by a user on a scale increased by a maximum desired volume gain, including the following steps: determining (204) the effective intensity applied to at least one loudspeaker, calculating (206, 208) a maximum volume gain from: the desired volume gain, the effective intensity applied to the loudspeaker, thermal characteristics of the loudspeaker, the maximum desired volume gain, calculating (210) an increasing monotonic function providing an variable applied volume gain according to the desired volume gain such that the image of the maximum desired volume gain by the monotonic function is equal to the maximum volume gain, applying (212), to the amplifier, as applied volume gain, the minimum of the maximum volume gain and the variable applied volume gain for the desired volume gain.

An audio/video recording and communication device configured as a doorbell has a housing with a support structure and a removable faceplate. A flexible translucent membrane of the faceplate supports a button aligned with a mechanical switch when the removable faceplate is attached to the housing such that a plurality of light emitting elements are positioned around the mechanical switch transmit light through the translucent membrane. A removable battery casing is configured to hold at least one battery and has a release button physically coupling with a detent of the support structure to retain the removable battery casing within the support structure. The removable battery casing may be removed from the device for recharging without removing the device from a surface on which it is mounted.

A hand-held exercise weight system has integral self protective features within each weight system. Each weight system has an activation button located near the user's thumb. One (1) weight system is equipped with a loud audible alarm to signal for help in times of duress. The other weight system is equipped with an ultrasonic dog repellent system, which deters any possible attacking canines. Each weight system is provided with a user replaceable battery, and is self-contained and waterproof. Each weight system has a weighted body that is detachable from the system.