Microphone-Array Bluetooth Conference Speaker

Application

PC and mobile phones can be connected via Bluetooth or USB
Supports Bluetooth 4.2 and can be easily upgraded to Bluetooth 5.0
Supports various meeting client software such as Skype, Webex, Zoom, and Tencent Meeting
Battery-powered, portable
Supports far-field voice pickup, with a pickup distance of over 5 meters
Can clearly pick up sound even in slightly noisy environments or rooms with significant echo

Utilizes XMOS audio DSP processing technology
Beamformer: Enhances voice pickup within the beam while suppressing noise outside the beam
AEC: Echo cancellation algorithm, mono 16Khz sampling rate, echo suppression ratio reaches 70dB+, Tail Length: 400ms
DOA: Real-time localization of the speaker's sound source position and angle, accuracy ±5 degrees
NS: Noise reduction algorithm, capable of suppressing both steady-state and non-steady-state noise, with a suppression ratio of up to 20dB
AGC: Automatic gain control, high dynamic range, flexible and adjustable
All the above algorithms provide numerous parameter interfaces for user fine-tuning
Additionally, offers rich EQ and DRC optional algorithms for correcting the frequency response curves of microphones and speakers

Uses Infineon's latest Class D technology
Utilizes 5-level PWM modulation technology in BTL configuration
Multi-Level modulation technology combines high modulation ratio, lower MOS conduction voltage, lower MOS losses, and filter-less technology
Infineon's Class D offers high efficiency, ultra-low power consumption, and heat generation, while providing higher THD+N and signal-to-noise ratio
Suitable for applications requiring long battery life and high sound quality

Utilizes Microchip Bluetooth technology
Supports HCI interface stand-alone dual-mode Bluetooth module
Supports traditional Bluetooth and BLE 4.2 Bluetooth protocol
Supports HFP 1.6, HSP 1.2, A2DP 1.3, SPP 1.2, AVRCP 1.6
Supports high-definition digital IIS audio up to 96KHz/24bit
Supports SBC and AAC decoding
Built-in 20-bit DAC with a signal-to-noise ratio of up to 96dB
Built-in 16-bit ADC with a signal-to-noise ratio of up to 90dB
BLE part can cooperate with Microchip MBA APP for command control, pairing control, and Bluetooth module power on/off control

USB Connection
Direct support for USB 1.0 interface, driver-free on Windows, MAC, and Android.
Supports UAC 1.0 protocol, also supports HID protocol for communication with touch buttons.
Supports USB DFU protocol for easy software upgrades.
Bluetooth 4.2 Connection:
Through the Bluetooth module, easily supports Bluetooth 4.2 connection.
Supports Bluetooth profiles such as A2DP 1.3, HFP 1.6, HSP 1.2, AVRCP 1.6, SPP 1.2.
The Bluetooth module has a built-in HiFi-grade CODEC, with audio resolution up to 24bit/96Khz.
In this solution, it not only meets the high audio quality requirements for conference calls but also ensures high-quality music enjoyment for users during entertainment use.

Implements functions such as volume increase and decrease, pick up and hang up, Bluetooth and USB mode selection buttons, etc.
Supports 8-way touch; in standby mode, 8-channel scanning takes only 70ms, with a power consumption of 120uA
In deep sleep mode, the operating current is nearly 5uA

Main Chip: