Background
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
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 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
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