---
author: "Umesh Malik"
canonical: "https://umesh-malik.com/blog/tag/acoustic-modem"
description: "Explore articles tagged with Acoustic Modem by Umesh Malik — AI Engineer, LLM & GenAI Developer. Learn Acoustic Modem best practices, practical tips, and in-depth guides."
title: "Umesh Malik's Blog - Acoustic Modem Articles | Acoustic Modem Tutorials"
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# Acoustic Modem

1 article

 [![Dashboard cover of a two-phone acoustic link: 50 ms symbols, 18 tones per band, and no network](https://umesh-malik.com/blog/how-to-send-data-between-phones-using-sound-cover.png)

Web Engineering • Oct 17, 2026

### How to send data between phones using sound: 600 ms frames

How to send data between phones using sound with 16-ary FSK at 50 ms per symbol. A ball is a 600 ms frame, and CRC-8 drops a bad one.

10 min read

Read more →](https://umesh-malik.com/blog/how-to-send-data-between-phones-using-sound)