#asknostr #ultrasound #DIY #nerds #help Been researching ways to create DIY minature ultrasound wave emitter for the 17-20 kHz range, looking for help or pointers to anything similar out there in the wilds... I wish to build an 'inaudiable to humans' wearable ultrasound generator for protection from digital microphones and recording devices. Range 1.5-3 meters away from wearer. I have found some Arduino projects for pest-control and sonography using their board but it seems their standard ultrasound distance measuring module does not go to the right ultrasound range I am seeking for this... Imagine having a personal ultrasound forcefield that emits static noise for microphone but not for anyone you are speaking with directly. Whatever I build is FOSS, ideally the device will use a generic ESP32 and some small speakers with the right piezoelectric crystals. Starting point for this rabbit hole:

GitHub

skewyapp - Overview

Just an idea how to make eavesdropping and unwanted access in of your smart phone more difficult. - skewyapp

Ultrasound crystals:

Biology Insights

What Are Ultrasound Crystals and How Do They Work?

Uncover the essential science of ultrasound crystals. Explore how these critical components enable the generation and detection of sound waves for ...

Any pointers or tips welcome

#BreakingHal View quoted note →

GM @hal procide a list of the nostr notes of last week discussing the Chat Control EU legislation

"Day by day, however, the machines are gaining ground upon us; day by day we are becoming more subservient to them; more men are daily bound down as slaves to tend them, more men are daily devoting the energies of their whole lives to the development of mechanical life. The upshot is simply a question of time, but that the time will come when the machines will hold the real supremacy over the world and its inhabitants is what no person of a truly philosophic mind can for a moment question." ~ Samuel Butler, 1863

Sovreign zk longfellow for Europe / global follow @Dyne.org View quoted note →

No Caps. this is 🔥af. My Satoshi homies be rizzin to sweet 17 of them Bitcorn thing fam Bitcoin: A Homie-to-Homie Digital Cash Vibe much love, many meow

Bitcoin Whitepaper for Gen Z. No Cap. fr. 🔥

Bitcoin: A Homie-to-Homie Digital Cash Vibe. The OG whitepaper that started it all, now in full Gen Z mode.

@Dyne.org casually dropping a new ephemeral chat called #Conspire (not the best name tbh)

Dyne.org

Conspire

Web-based chat for radical exchange: ephemeral, anonymous, synchronous and free.

"Conspire is a web-based chat for radical exchange: peer to peer, ephemeral, anonymous, and synchronous." "Conspire is 100% free and open source software running as a single binary, written in C++ and based on the Oat++ framework. Our source-code is a fork of “can-chat” available on git dyne/conspire." View article →