- Order number: Seeed-107990056
 - Manufacturer product ID: 107990056
 
Seeed’s ReSpeaker 4-MicsLinear Array Kit for Raspberry Pi is an extension board, aka HAT designed for Raspberry Pi. It's a linear microphone array kit, comes with four microphones and designed for AI and voice applications. That means you can build a more powerful and flexible voice product with Raspberry Pi which can integrate Amazon Alexa Voice
 Service, Google Assistant, and so on.
 ReSpeaker 4-Mic Linear Array Kit for Raspberry Pi consists of two boards, one is voice accessory HAT, another is four microphones linear array.
 ReSpeaker 4-Mic Linear Array Kit for Raspberry Pi support 8 input & 8 output channels in Raspbian system. The first 6 input channel for microphone recording(only first 4 input channels are valid capture data), rest of 2 input channel are echo channel of playback. The first 2 output channel for playing, rest of 6 output channel are dummy.
Features
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2 ADC chips and 1 DAC chip
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8 input and 8 output channels
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Four microphones array
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Grove support
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Compatible with Raspberry Pi 40-pin headers
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Headset and speaker voice output
 
Application Ideas
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Smart speaker
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Intelligent voice assistant systems
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Voice recorders
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Voice conferencing system
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Meeting communicating equipment
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Voice interacting robot
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Car voice assistant
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Other scenarios need voice command
 
Technical Details
| Battery | Exclude | 
| AD/DA Chips | 2 x X-Power AC108 ADC; 1 x X-Power AC101 DAC | 
| Voice Output | 3.5mm headset audio jack / Speaker jack (JST 2.0) | 
| Microphones | SPU0414HR5HSB | 
| Sensitivity | -22 dBFS (Omnidirectional) | 
| SNR | 59 dB | 
Part List
| 1 x ReSpeaker Voice Accessory HAT | 1 | 
| 1 x ReSpeaker 4-Mic Linear Array for Voice Accessory HAT | 1 | 
| 1 x 20cm Ribbon Cable | 1 |