Voice Assistant Solutions

Application

Description

High-performance microphone solutions for smart speakers and voice-controlled devices.

Core Advantages

Up to 66dB SNR for excellent far-field performance

PDM digital output for easy processor interface

Compact size for discrete placement

Array support for beamforming

Core advantage 5 for Voice Assistant Solutions

Recommended Bill of Materials (BOM)

Item	Part Number	Description	Quantity	Datasheet
1	SPH0645LM4H	High SNR digital microphone	4-6	📄 Download
2	DSP-Audio	Audio DSP with PDM input	1	📄 Download
3	Amp-ClassD	Class-D speaker amplifier	1	📄 Download

Applications

Smart Speakers

Voice Assistants

Smart Home

Voice Control

Technical Specifications

Microphone S N R

Up to 66dB

Output

PDM Digital

Array Support

2-6 microphones

Customer Success Stories

Smart Speaker OEM

| Far-field voice control smart speaker

Challenge

Design challenge for Smart Speaker OEM application

Solution

Implemented Goertek components with optimized design

Results

Excellent wake-word recognition at 5+ meter distance

Customer 2

| Application 2

Challenge

Design challenge for Customer 2 application

Solution

Implemented Goertek components with optimized design

Results

Excellent results achieved

FAE Expert Insights

Senior FAE Team

Field Application Engineering Team

Professional Insights

Voice assistant design focuses on far-field voice capture, wake-word recognition, and noise rejection. Key considerations include microphone array design, acoustic echo cancellation, and integration with voice algorithms. This comprehensive guide covers all aspects of Voice Assistant Solutions implementation, including component selection criteria, system integration best practices, and troubleshooting recommendations. Our FAE team has extensive field experience with these solutions and can provide personalized design support for your specific application requirements. Contact BeiLuo FAE team for detailed technical consultation and design review services.

Key Takeaways

Select components based on application requirements
Ensure proper power supply and PCB layout design
Validate performance through testing
Contact BeiLuo FAE team for design support

Decision Framework

Steps:

1) Use high SNR digital microphones for best performance
2) Design microphone array for beamforming
3) Implement acoustic echo cancellation
4) Optimize for wake-word detection
5) Consider noise sources in typical use environment.

Ready to Implement This Solution?

Contact our FAE team for design support and quotes

Frequently Asked Questions

Which microphone is best for voice assistant applications?

For voice assistants, we recommend SPH0645LM4H (66dB SNR digital) for premium applications or SPH0641LU4H (64dB SNR digital) for cost-effective designs. Digital microphones with PDM output are preferred for direct connection to voice processors. Use multiple microphones in array configuration for far-field performance. Contact BeiLuo FAE team for voice assistant design guidance.

High SNR digital microphones for voice assistants.

How many microphones do I need for far-field voice pickup?

For far-field voice pickup: 2 microphones provide basic noise reduction

4 microphones enable good beamforming for 3-5 meter range

6+ microphones provide excellent performance for larger rooms. Array spacing of 20-40mm is typical. More microphones improve directionality and noise rejection. Contact BeiLuo FAE team for array design guidance.

4-6 microphones for good far-field performance.

What is beamforming and how does it help?

Beamforming is a signal processing technique that uses multiple microphones to create a directional pickup pattern. It enhances voice capture from the desired direction while rejecting noise from other directions. This improves far-field performance and wake-word recognition in noisy environments. Contact BeiLuo FAE team for beamforming implementation guidance.

Beamforming improves directionality and noise rejection.

How do I prevent false wake-word triggers?

To prevent false wake-word triggers: 1) Use high SNR microphones for clean audio capture

2) Implement microphone array for spatial filtering

3) Tune wake-word algorithm threshold

4) Use adaptive noise cancellation

5) Consider multi-stage wake-word detection. Contact BeiLuo FAE team for wake-word optimization guidance.

Use high SNR mics and proper algorithm tuning.

What is the optimal microphone spacing for arrays?

Optimal microphone spacing depends on application: 20-30mm spacing for compact devices like smart speakers

40-60mm for larger devices

80-100mm for far-field applications. Smaller spacing provides wider beam but less directionality. Larger spacing improves directionality but may cause spatial aliasing at high frequencies. Contact BeiLuo FAE team for array spacing guidance.

20-40mm typical spacing for voice applications.