Aac Microtech (changzhou) Co, , Ltd.

Aac Technologies Pte. Ltd.

Aac Acoustic Technologies (shenzhen) Co., Ltd.

Aac Technologies (nanjing) Co., Ltd.

Yiming Meng

Hao Yin

Shuyuan Sun

Guqing Zhang

Wei Pang

Xin Zhang

Henglizi Zhang

Xiaojiang Gu

Yunxia Xu

Huan Ge

Wei Liu

Xiang Huang

Peilin Yang

Yanhao Feng

A coaxial double-sided speaker device includes a frame, first and second vibration units fixed to two opposite sides of the frame, a magnetic circuit unit, and a front cover fixed to the frame and provided under the first diaphragm. The first vibration unit includes a first diaphragm fixed to the frame and a first voice coil. The second vibration unit includes a second diaphragm fixed to frame and a second voice coil. The front cover and first diaphragm are spaced apart to form a first front cavity. The frame is provided with a sound leading channel including first and second openings respectively toward the first and second diaphragms. The first opening communicates with the first front cavity. The second opening is located at periphery of the second diaphragm. The double-sided speaker device has a higher volume, a smaller product size and a higher utilization rate of the magnetic circuit unit.

Double-sided speaker device

Disclosed are a method and a system of audio signal processing for in-vehicle virtual multichannel sound, and an electronic device. The method includes: obtaining an audio input signal in a single audio channel; identifying different frequency components in the audio input signal; assigning audio data in different frequency bands of the audio input signal to different signal paths according to the different frequency components; performing a digital signal processing on the audio data from different signal paths to obtain a plurality of single-channel signals in different frequency bands; and combining the plurality of single-channel signals into a single-channel audio output signal and outputting it. The present application not only realizes individual digital signal processing of different frequency bands for multiple speakers connected in parallel to a single audio channel, to improve the sound quality of the whole vehicle, but also reduces the cost of the whole vehicle.

Method and system of audio signal processing for in-vehicle virtual multichannel sound, and electronic device

The audio playing method is provided by embodiments of the present disclosure, applied to on-board audio system (including multiple speaker modules arranged at different positions in a car cabin, the audio playing method includes: obtaining an audio signal to be played; decomposing the audio signal to obtain multiple audio source signals of different categories, where each of the multiple sound source signals includes multiple sub sound source signals of a same category; establishing a route between all sub sound source signals and the multiple speaker modules according to a preset distribution principle indicating rules for playing different sub sound source signals by different speaker modules; and playing each of the multiple sub sound source signals by a corresponding speaker module according to the route. The present disclosure provides more accurate and immersive car multi-channel surround sound playback, which can effectively improve overall acoustic experience of the on-board audio system.

Audio playing method, on-board audio system, and storage medium

Disclosed are a motion-sensing in-vehicle alerting method, a system, and a related device, which are applied to vehicles. The method includes steps of: obtaining, by a controller, an audio signal from an in-vehicle audio bus; performing an acoustic characteristics analysis on the audio signal, and extracting an acoustic waveform of the audio signal in a time domain waveform; performing an amplitude modulation on a sinusoidal signal of the acoustic waveform to obtain a modulated sinusoidal signal after amplitude modulation; obtaining, by the controller, a control signal indicating operational behavior information from an in-vehicle control bus, matching the control signal with the modulated sinusoidal signal according to a predetermined rule to generate a vibration signal, and transmitting the vibration signal to the excitation oscillator to achieve a vibration alert. The method of the present application not only enhances safety, but also provides the vibration alert, resulting in an improved user experience.

Motion-sensing in-vehicle alerting method, system and related device

The invention provides a sound field optimization method, including steps of building up a first acoustic response model for a controlled area inside a car and building up a second acoustic response model for an uncontrolled area inside the car; building up a first acoustic response difference calculation model based on the first acoustic response model and the second acoustic response model; calculating optimal solution of audio parameters; and controlling each speaker to output audio signals according to corresponding optimal solution of audio parameters. Thus, the vocal area isolation is achieved, so as to provide more extreme acoustic hearing, sound field effect in the controlled area where the user is located inside the car is optimized.

Sound field optimization method and device performing same

The application relates to a sound quality output method. The method includes: obtaining the current volume level input by the user; determine the audio signal gain difference between the current volume level and the baseline volume level according to the current volume level and the preset baseline volume level, determining an equal loudness curve difference between the current volume level and the baseline volume level according to the audio signal gain difference, and the current volume level and the baseline volume level, determining the audio quality response curve corresponding to the current volume level according to the equal loudness curve difference and the pre-stored audio quality response curve corresponding to the baseline volume level, determining the output signal parameters of multiple audio output channels according to the audio quality response curve corresponding to the current volume level. The application optimizes the sound quality effect and enhances acoustic experience.

In-car adaptive sound quality output method, device, storage medium and car audio system

The present disclosure discloses an in-vehicle independent sound zone control method, a system and a related device, applied to a vehicle. The method includes the following steps: presetting a control area and a non-control area; arranging a speaker array behind a front seat of the vehicle for generating a first acoustic response, and arranging a headrest speaker at a headrest on a rear seat of the vehicle for generating a second acoustic response; fitting a virtual target speaker, wherein the virtual target speaker is configured to generate a target acoustic response within the control area; and controlling a sound quality of the in-vehicle independent sound zone through an audio algorithm processing on the target acoustic response, the first acoustic response and the second acoustic response.

In-vehicle independent sound zone control method, system and related device

The present disclosure provides a sound generating device, which includes a frame, a vibration system, and a magnetic circuit system. The vibration system includes a membrane and a dome. The membrane includes a vibrating part, a suspension, a fixing part, and a first through hole, the frame, the membrane, and the magnetic circuit system form an inner sound cavity communicated with the first through hole. The dome is fixed to the vibrating part, and includes a first body layer, a second body layer, and an air-permeable isolating piece sandwiched between the first body layer and the second body layer. The first body layer defines a second through hole communicating with the first through hole, the second body layer defines a third through hole communicating with the second through hole. The air-permeable isolating piece covers the second through hole and the third through hole.

Sound generating device

The present disclosure provides a sound generating device, which includes a frame, a vibration system, and a magnetic circuit system. The vibration system includes a membrane, a dome, and an air-permeable isolating piece. The membrane is fixed to the frame and configured to define an inner sound generating cavity together with the frame and the magnetic circuit system. The vibrating membrane includes a vibrating part, a suspension, and a fixing part, the vibrating part defining a first through hole communicated with the inner sound generating cavity. The dome is attached to a side of the vibrating part, and the dome defines a second through hole communicating with the first through hole. The air-permeable isolating piece is attached to a side of the dome, and a side of the air-permeable isolating piece is sunken to form a leakage groove communicating with the second through hole.

A micro-speaker is disclosed. The micro-speaker includes a frame with a hollow space, a diaphragm attached to the frame, a voice coil with a lead, a yoke received in the hollow space, a magnet received in the yoke. The yoke includes a base wall in shape of rectangle with two long boundaries and two short boundaries. The base wall includes a first portion locating at the middle of the base wall and two second portions locating at two ends of the first portion and extending to the two short boundaries respectively. The first portion has a thickness greater than the second portion. The second portion of the base wall provides an extra space for at least part of the lead so as to avoid the lead bumping against the base wall.

Micro-speaker using slope for connecting a first portion and a second portion of the base wall to avoid lead bumping

An electro-acoustic device is provided, including a frame; a magnetic circuit received in the frame and including a lower plate fixed on a bottom of the frame and a magnet attached on the lower plate; a vibration system received in the frame and including a vibrating diaphragm attached to a top of the frame; a cavity formed cooperatively by the lower plate, the frame and the vibrating diaphragm; a leak hole provided between the frame and the lower plate for communicating with outside of the electro-acoustic device; and a damper attached to the lower plate and located inside of the electro-acoustic device for covering the leak hole internally.

Electro-acoustic device

A miniature speaker is disclosed. The miniature speaker includes a frame providing a receiving space, a magnetic circuit positioned in the receiving space and a vibration unit including a diaphragm and a voice coil driving the diaphragm. The magnetic circuit includes a main magnet positioned on a center of the lower plate, a pair of auxiliary magnets positioned spaced from the main magnet for forming a magnetic gap, a pole plate attaching to a top surface of the main magnet, and an upper plate. The upper plate includes a pair of main segments attached to top surfaces of the auxiliary magnets, and a pair of connecting beams connecting with the main segments and located between the two auxiliary magnets. The magnets are prevent from being attracted to each other by virtue of the upper plate.

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Shenzhen, China

Yiming Meng