# Anatomy of a Voice-Integrated Device

DevFeed: [Anatomy of a Voice-Integrated Device](<https://devfeed.tech/articles/anatomy-of-a-voice-integrated-device-13805.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/anatomy-of-a-voice-integrated-device/>)

Author: John Lee

Published: 2018-08-12T00:00:00Z

Content type: article

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [Hardware](<https://devfeed.tech/topics/hardware.md>), [ESP32](<https://devfeed.tech/topics/esp32.md>), [Algorithms, Complexity](<https://devfeed.tech/topics/algorithms-complexity.md>), [Wi-Fi](<https://devfeed.tech/topics/wi-fi.md>)

Tags: [alexa](<https://devfeed.tech/tags/alexa.md>), [audio](<https://devfeed.tech/tags/audio.md>), [blog](<https://devfeed.tech/tags/blog.md>), [connectivity](<https://devfeed.tech/tags/connectivity.md>), [dsp](<https://devfeed.tech/tags/dsp.md>), [embedded](<https://devfeed.tech/tags/embedded.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [framework](<https://devfeed.tech/tags/framework.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [interface](<https://devfeed.tech/tags/interface.md>), [speakers](<https://devfeed.tech/tags/speakers.md>), [voice](<https://devfeed.tech/tags/voice.md>), [voice-assistant](<https://devfeed.tech/tags/voice-assistant.md>), [wi-fi](<https://devfeed.tech/tags/wi-fi.md>)

## AI overview

This article explains the internal components and audio-processing path of a voice-integrated device using Alexa as an example. It describes local wake-word detection, cloud processing of the remaining command, and hardware options including ESP32, connectivity processors, digital signal processors, microphones, and speakers.

## Source excerpt

Recently I have seen significant interest from OEMs in embedding voice assistants, like Alexa, directly into their products. Not just linking with a voice-assistant using a cloud to cloud integration, but by having the product itself be voice-enabled (with microphones and speakers). For example, a washing machine with a voice interface for starting it, or a smart switch with "Echo" embedded into it. Let us have a quick look at the internal components of a typical Voice-Integrated device.