Speech recognition module with LD3320 chip

Description

Speech recognition module based on the LD3320 chip. It uses a human speech processing algorithm that guarantees 95% accuracy in recognizing keywords. Words and phrases are saved in the system memory (no external memory required), where the user can store up to 50 phrases up to 79 bytes each. Built-in 16-bit A/D and D/A converters ensure good quality data processing, and the amplifier allows you to play sounds through a 3.5 mm mini jack connector. The module has a built-in microphone, but the user can also connect an external microphone. It will work in various types of projects that use speech recognition and voice control.

Features

• Ability to store up to 50 keywords
• Single word/phrase length up to 79 bytes
• Built-in A/D and D/A converter with 16 bit resolution
• Audio amplifier circuit
• Two 3.5mm mini jack connectors for connecting headphones and a microphone
• It does not require external memory and control system
• Support for MP3 playback
• Supply voltage: 3.3 V or 5 V
• Standby power consumption: up to 1 uA
• SPI interface
• 20 MHz quartz
• Two 3.5mm Jack audio outputs