--- title: How Bats Gave Me a Project Idea (and Why I’m Building It... description: A developer shares how reading about bat echolocation inspired a project idea: building a sonar system using only a laptop's built-in speaker and microphone.... canonical: https://daily.dev/posts/how-bats-gave-me-a-project-idea-and-why-i-m-building-it-on-just-my-laptop--mxlydahjo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How Bats Gave Me a Project Idea (and Why I’m Building It on Just My Laptop) | daily.dev og:description: A developer shares how reading about bat echolocation inspired a project idea: building a sonar system using only a laptop's built-in speaker and microphone.... og:url: https://daily.dev/posts/how-bats-gave-me-a-project-idea-and-why-i-m-building-it-on-just-my-laptop--mxlydahjo og:image: https://api.daily.dev/og/posts/mXlYdaHJO.png og:image:alt: How Bats Gave Me a Project Idea (and Why I’m Building It on Just My Laptop) og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How Bats Gave Me a Project Idea (and Why I’m Building It on Just My Laptop) **[Medium](https://daily.dev/sources/medium_js)** · 5 min read · 0 upvotes · 0 comments ## Summary A developer shares how reading about bat echolocation inspired a project idea: building a sonar system using only a laptop's built-in speaker and microphone. After discovering prior art (a 2012 blog post and a 2013 Hackaday project using Python and conference call hardware), the author reframes the hardware limitation as a design constraint. The plan is to first characterize the laptop's usable frequency range near the edge of human hearing, then implement chirp design, cross-correlation math, and a live radar-style readout — all without any external hardware. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Echolocation For Drones](https://daily.dev/posts/echolocation-for-drones-syex94dhy) · Hackaday · 0 upvotes · 0 comments - [Why a researcher is building robots that look and act like bats](https://daily.dev/posts/why-a-researcher-is-building-robots-that-look-and-act-like-bats-ygtrtwq0x) · TechCrunch · 0 upvotes · 0 comments - [Ultralightweight sonar plus AI lets tiny drones navigate like bats](https://daily.dev/posts/ultralightweight-sonar-plus-ai-lets-tiny-drones-navigate-like-bats-lidedy8w3) · Robohub · 0 upvotes · 0 comments - [Pico-Driven Ultrasound Enables Scaled Acoustic Model Of Home Stereo](https://daily.dev/posts/pico-driven-ultrasound-enables-scaled-acoustic-model-of-home-stereo-t5axfyqop) · Hackaday · 0 upvotes · 0 comments - [Someone built a full 360° sonar on an ESP32, and the code is simpler than you'd think](https://daily.dev/posts/someone-built-a-full-360-sonar-on-an-esp32-and-the-code-is-simpler-than-you-d-think-jwwhwby3m) · XDA Developers · 0 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#signal-processing](https://daily.dev/tags/signal-processing), [#audio-processing](https://daily.dev/tags/audio-processing) [View this post on daily.dev](https://daily.dev/posts/how-bats-gave-me-a-project-idea-and-why-i-m-building-it-on-just-my-laptop--mxlydahjo) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How Bats Gave Me a Project Idea (and Why I’m Building It on Just My Laptop)","url":"https://daily.dev/posts/how-bats-gave-me-a-project-idea-and-why-i-m-building-it-on-just-my-laptop--mxlydahjo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-bats-gave-me-a-project-idea-and-why-i-m-building-it-on-just-my-laptop--mxlydahjo"},"datePublished":"2026-07-23T07:10:47.674Z","dateModified":"2026-07-23T07:11:28.521Z","description":"A developer shares how reading about bat echolocation inspired a project idea: building a sonar system using only a laptop's built-in speaker and microphone....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/60db2b33e9d2d245f2508fec289ff0ae?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/60db2b33e9d2d245f2508fec289ff0ae?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Medium","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Medium","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/medium","url":"https://daily.dev/sources/medium_js"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-bats-gave-me-a-project-idea-and-why-i-m-building-it-on-just-my-laptop--mxlydahjo","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"python,signal-processing,audio-processing","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Medium","item":"https://daily.dev/sources/medium_js"},{"@type":"ListItem","position":3,"name":"How Bats Gave Me a Project Idea (and Why I’m Building It on Just My Laptop)"}]} ```