PXU316-LA-7MIC Seamless Local Amplification Solution

Params

BF Beamforming 10~180 adjustable pickup angle
Microphone Input Frequency Response 0~16KHz
Line-out Output Frequency Response 0~8KHz@0db/1Vrms
Power Consumption 5V@130mA
DOA Angle ±10 Degrees
Side Lobe Suppression 20dB
System Delay 18ms

App

PXU316-LA-7MIC is a local amplification solution with 7 microphones aimed at conference scenarios, very suitable for business users such as local amplification device manufacturers to evaluate and test.

This solution can be supplied in the form of PCBA or a complete solution, and Pawpaw Electronics provides pre-sale and after-sales technical services to users.

‌‌Purchase

Evaluation Board

Name Function Description Status Purchase
PXU316-LA-7MIC 7-Mic Local Amplification Evaluation Board Available Taobao

Background

Local Amplifier Scenario Illustration

7-MIC directional pickup, 18ms ultra-low latency, 32KHz sample rate, achieving seamless local amplification

In settings like presentations, meetings, and classrooms, the local amplification solution aims to provide a smooth speaking experience and clear, comfortable listening experience. Its core requirements include:

  • Excellent directionality to effectively isolate environmental noise;
  • A flexible pickup range of 1-3 meters to ensure the speaker location-free;
  • Ultra-low latency to avoid the discord caused by sound delay;
  • High fidelity output for vocal frequencies, enhancing the listening experience.

The Local Amplifier Solution

The PXU316-LA-7MIC local amplification solution uses a 7-microphone array and beamforming technology to set the pickup area, significantly reducing unwanted sound from non-target areas and achieving up to 30dB sound isolation. The optimized algorithm and architecture of the main controller achieve a low latency of just 18ms, providing an seamless experience. The adaptive feedback cancellation (AFC) algorithm effectively prevents squeal (feedback), allowing for an amplification increase of more than 10dB.

Additionally, the main controller processes audio at a high sampling rate of 32KHz@24bit, ensuring high-fidelity output within the 10kHz vocal frequency range and accommodating the needs of wide-spectrum sound processing, fitting more application scenarios. Integrated with BF, AFC, NS, AGC, EQ, and other audio processing algorithms, it optimizes voice output to ensure the presenter's voice is delivered in real-time and clearly, giving the audience a vivid and natural listening experience.

Features

Main Controller
High-Performance Audio Processor

Uses a highly flexible, powerful DSP chip.

  • 18ms system delay
  • 32kHz@24bit sampling rate
  • Hardware-level VPU acceleration
  • Integrated audio front-end processing algorithms
DSP Processing
DSP Algorithms

Integrates multiple local amplification algorithms for high-definition voice experience.

  • Noise Suppression (NS)
  • Adaptive Feedback Cancellation (AFC) to prevent howling and squealing
  • Automatic Gain Control (AGC) to maintain consistent loudness
Beamforming
Beamforming

Sets a directional pickup area to avoid unwanted external noise.

  • ±10° DOA range error
  • Adjustable 10° - 180° pickup range
  • Up to 20 dB sidelobe suppression

Technical Documents

Software Download

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