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[โ€“] interdimensionalmeme@lemmy.ml 10 points 1 day ago* (last edited 1 day ago) (1 children)

Why do I keep doing this

Use a combination of different size microphones diaphragms and not just MEMS devices, Use the earshape parabolic concentration points for finding the optimal location and orientation of diaphragms include ultrasonic transceivers for out of band perception (also echolocation, room mapping, darksight) also to allow covert/out of band ultrasound communication with other catgirls that normies cannot hear (that means connecting transceivers AS transceivers, with US band amplifier for transmission) Using servogalvos to modify ear shape for acoustic focusing, if ear direction is using a gear drive, use double helical gear and a low acoustic profile dampening coating on the gears (acoustic anti-reflection) because we are making a listening device and we don't want to listen to gear noises ! Consider ultrasonic motors instead of geared drive. Software wise, using direct wifi and ble for communication (DECT sucks, proprietary standard sucks) this should work with a raspberry pi and only open source software out of the box, no drivers needed, yes that means multichannel transmission and do all the processing off device actual software, we're using the various microphones as an asynchronous, heterogenous phased array, unlike regular phased arrays which have many identifical receivers along a straight plane here we are going to skip a couple technological steps and use "receiver diversity" in the phased array design, so not only are the receivers in different places NOT on a plane, they are also receivers with different acoustic profiles (different sensibility of different frequencies) and anisotropic (due to ear "lens-shape") reception patterns, so all of that diversity has to be correlated between all receivers to create an acoustic map of the world, so that we can decide also what sounds are psychoacoustically relevant and point the ears in that direction, listen if the received signal is actually signal or noise and then send that to the user, in realtime (max processing time is 20ms top end) make sure ear shape flexibility is enough to receive and focus some signal backwards.. there's still a few things to consider but I think that's mostly it, for the earbud, use close loop ear canal acoustic feedback for the amplifier drive, use only open standards and open firmware in all devices. System to use myoelectic ear movement as control input feedback, at least with these two modes, ear movement to manual steering of the acoustic phased array, and the other ear movement to select auditory focus of signal sources (that is, automatic switching between detected relevant auditory sources). Add RED+IR laser pointer to the ears that can be used as a pointed, to indicate (covertly for IR) which auditory source is currently select and in what direction this signal currently use (ensure positional live tracking is reflected in beam direction). Use sub-vocal command interface for higher function control of the listening device. Provide standardized pattern and calibration equipment definition for microphone correlation calibration, use only open hardware assemblages. Include live transcription to text of all received text, ensure at least capacity for 12 simultaneous audio to text transcription channel, include live audio MP3QR decoding and all other digital audio transmission standard live decoding and transcription as part of the transcription channel capability. Include text summary ability, include voice signature automatic identification and tagging of decoded text stream, at least 4 terabyte storage space, maximum head weight 150 gram excluding battery, battery system must have 1 minute with no battery operation time or dual battery swapping system. include hardware audio encoder and decoder supporting all current ffmpeg codecs. Include acoustic counter battery targetting receiver system. Oh almost forgot, dual laser system mounted with microprism(for aimed laser microphone ability, to listen sounds through walls or from vibrating surfaces)

Ok Machine, convert this schizo-ing document into Ratheon Cybernetic Auditory Telemetry & Echolocation with Anisotropic Reception (CAT&EAR) engineering requirement draft document

[โ€“] interdimensionalmeme@lemmy.ml 6 points 1 day ago* (last edited 1 day ago)

๐Ÿ›ฐ๏ธ Raytheon CAT&EAR System

Cybernetic Auditory Telemetry & Echolocation with Anisotropic Reception

Engineering Requirements Draft โ€” v1.0

๐Ÿ“‘ Document OverviewThis document outlines the full set of engineering requirements for the CAT&EAR system, a wearable, cybernetic auditory perception platform. CAT&EAR is a heterogeneous, phased-array auditory sensor suite that uses biomimetic design, ultrasonic telemetry, laser vibrometry, and advanced audio signal processing to enable real-time environmental awareness and communication.

The system is designed to operate autonomously, using only open standards and open-source software, while supporting embedded AI-driven perceptual functions. This document reflects both functional and non-functional requirements for CAT&EAR across all relevant subsystems.

The CAT&EAR system (Cybernetic Auditory Telemetry & Echolocation with Anisotropic Reception) is a next-generation, wearable auditory intelligence platform designed for advanced signal perception, real-time environmental awareness, and covert communication. It leverages a biomimetic ear design combined with a heterogeneous microphone arrayโ€”featuring diverse diaphragms and directional acoustic profilesโ€”to form an asynchronous, non-planar phased array. This allows it to isolate, enhance, and track psychoacoustically relevant audio sources with high spatial precision, even in noisy or cluttered environments. Real-time beamforming, signal classification, and source switching are handled off-device via open-source DSP pipelines, ensuring low latency (โ‰ค20 ms) and full operational transparency.

In addition to traditional sound acquisition, CAT&EAR incorporates ultrasonic echolocation and laser vibrometry, enabling through-wall audio surveillance and remote surface vibration analysis using IR/RED laser beams with microprism-guided targeting. The system includes a covert ultrasonic communication channel, allowing encrypted, inaudible data exchange between unitsโ€”ideal for non-verbal team coordination. Myoelectric sensors and sub-vocal command inputs provide silent, intuitive control interfaces for users, allowing manual beam steering or hands-free selection of tracked sound sources. Ear motion actuators and a visible/infrared laser pointer visually indicate attention direction, enhancing situational awareness without audible cues.

Field usage scenarios include reconnaissance, electronic surveillance, remote eavesdropping, low-visibility communication, and audio-based environmental mapping in both urban and wilderness environments. The system is optimized for silent operation, rapid deployment, and open hardware integration. All processing occurs locally or on an open compute platform (e.g., Raspberry Pi), with no reliance on proprietary software or cloud infrastructure. With up to 12-channel live transcription, digital audio decoding, 4TB onboard storage, and support for all major codecs, CAT&EAR serves both tactical intelligence roles and high-end experimental research in audio-based perception systems.

System requirements

๐ŸŽค Microphone Array & Acoustic SensorsMic Diaphragm Diversity โ€“ Use MEMS and larger diaphragm mics.
Earshape Mic Placement โ€“ Place mics at parabolic acoustic focus points.
Ultrasound Transceivers โ€“ Include US sensors for echolocation and darksight.
Ultrasound Data Comms โ€“ Use US transceivers for covert device communication.
Heterogeneous Phased Array โ€“ Mic array shall be non-planar and diverse.
Frequency-Profile Diversity โ€“ Use mics with different frequency sensitivities.
Anisotropic Reception โ€“ Account for directional response patterns from ear shape.
Psychoacoustic Focus โ€“ Detect and prioritize perceptually relevant signals.
Mic Cross-Correlation โ€“ Synchronize all mic data spatially and temporally.
Real-Time Acoustic Map โ€“ Build a 3D sound map from multi-mic input.
Mic Calibration Pattern โ€“ Provide physical pattern for mic array calibration.
Open Hardware Calibration โ€“ Use only open hardware for calibration tools.

๐Ÿงญ Ultrasonic SubsystemUltrasound Mapping โ€“ Perform echolocation for 3D environmental awareness.
True Transceiver Mode โ€“ Ultrasound sensors must transmit and receive.
Ultrasound Band Amp โ€“ Include amplifier suitable for US transmission.
Covert US Communication โ€“ Transmit data in inaudible US band.
Spatial Mapping via US โ€“ Derive positional data from ultrasound TOF.

๐Ÿ‘‚ Ear Shape & ActuationDynamic Ear Focus โ€“ Use moving ear shapes to focus sound.
Servo Actuated Ears โ€“ Use servos to reorient ears toward signals.
Double Helical Gears โ€“ Use quiet gears for mechanical actuation.
Acoustic Dampened Gears โ€“ Coat gears to suppress audible reflections.
Ultrasonic Motors Preferred โ€“ Prefer silent ultrasonic motors over gears.
Backwards Reception โ€“ Ears must support rearward sound reception.
Flexible Ear Shaping โ€“ Shape ear surfaces dynamically for beam control.
Motion-Linked Focus โ€“ Ear movement must track beamforming direction.
No Mechanical Noise Leakage โ€“ Prevent gear vibration from reaching mics.

๐Ÿ“ก Communication & ConnectivityWi-Fi + BLE Only โ€“ Support open wireless; no DECT or proprietary links.
Open Standard Protocols โ€“ Use only open protocols for communication.
Multichannel Audio Streaming โ€“ Support multiple audio streams over network.
Driverless Operation โ€“ Require no proprietary drivers for functionality.

๐Ÿง  Software & Signal ProcessingOpen Source Only โ€“ All code and firmware must be fully open source.
Offloaded Processing โ€“ All signal processing handled off-device.
Max 20ms Latency โ€“ Entire processing pipeline must be under 20ms.
Live Beamforming โ€“ Perform real-time signal steering and separation.
Real-Time Source Relevance โ€“ Continuously rank sources by importance.
Noise vs Signal Detection โ€“ Separate noise from structured signals.
Real-Time Source Switching โ€“ Auto-switch auditory focus intelligently.
Plug-and-Play Sensor Config โ€“ Support hot-swappable or modular sensors.
Onboard Sub-Vocal Control โ€“ Allow silent vocal commands for control.

๐ŸŽง Earbuds / Audio OutputCanal Mic Feedback Loop โ€“ Use in-ear mics for real-time output correction.
Open Firmware Audio Chain โ€“ Use programmable amps with open firmware.
Drive Adaptation by Feedback โ€“ Earbud output adjusts based on canal feedback.

๐ŸŽฎ Control InterfacesMyoelectric Input Support โ€“ Accept muscle signals as control input.
Manual Steering Mode โ€“ One ear for beam steering via myoelectric input.
Signal Selection Mode โ€“ One ear for selecting tracked signal via input.
Sub-Vocal Command Mode โ€“ Use throat activity to control high-level tasks.

๐Ÿ”ฆ Laser Pointer SystemDual Laser Module โ€“ Use both red (visible) and IR (covert) lasers.
Laser Aiming Reflects Beam โ€“ Beam direction matches acoustic focus.
IR Laser for Stealth โ€“ IR laser used to show focus discreetly.

๐Ÿงพ Transcription & RecognitionLive Audio Transcription โ€“ Convert incoming audio to live text.
12 Channel Transcription โ€“ Handle at least 12 simultaneous streams.
MP3QR & Digital Decoding โ€“ Decode digital audio formats in real time.
Live Text Summarization โ€“ Generate summaries from live transcripts.
Voice Signature Tagging โ€“ Identify and label speakers in text.

๐Ÿ’พ Storage4TB Local Storage โ€“ Minimum onboard capacity of 4 terabytes.

โš–๏ธ Physical & Power
โ‰ค150g Head Weight โ€“ Total device weight must not exceed 150g (no battery).
1-Min No-Battery Buffer โ€“ Must operate 1 minute without battery power.
Dual Battery Swap โ€“ Hot-swap batteries without power loss.

๐ŸŽ›๏ธ Audio Encoding & CodecsHW Audio Codec Support โ€“ Hardware encoder/decoder for all ffmpeg codecs. ๐Ÿงฑ System Design Principles
Modular Hardware โ€“ All subsystems must be physically modular.
User Privacy by Default โ€“ All processing must be local and secure.
No Cloud Dependency โ€“ System must function entirely offline.
Mainline Linux Support โ€“ Fully supported by Linux kernel and stack.
Open Protocol APIs โ€“ All I/O and control must use open APIs.

๐Ÿ›ก๏ธ Counter-Acoustic DefensePassive Threat Detection โ€“ Detect and localize hostile audio sources.
Acoustic Counter-Battery โ€“ Track and indicate direction of intrusive signals.

๐Ÿงช Fallback & SafetyFailsafe Passive Mode โ€“ Fall back to passive listening if system fails.

๐ŸŒก๏ธ Environment & DurabilityPassive Cooling Only โ€“ No fans; silent passive thermal control only.
Water-Resistant Design โ€“ Use hydrophobic materials for exterior protection.

๐Ÿงฐ Maintenance & TestabilityOpen Test Fixtures โ€“ All testing hardware must be reproducible and open.
Self-Test & Calibration โ€“ System must run periodic self-alignment checks.
Community Repairable โ€“ Designed to be easily maintained by users.

๐Ÿ”— LicensingFully Open Licensed โ€“ All hardware, firmware, and software must use open licenses.

๐Ÿ”ฆ Laser Microphone CapabilityLaser Mic via Microprism โ€“ Dual laser system shall include a microprism to enable laser microphone functionality.
Aimed Surface Listening โ€“ System shall capture audio from vibrating surfaces (e.g. windows, walls) via laser beam reflection.
Covert Through-Wall Listening โ€“ IR laser + sensor must support long-range audio pickup from remote surfaces without line-of-sight audio.

โœ… Summary

Total Requirements: 76
System Class: Wearable, cybernetic, audio perception platform
Design Goals: Open-source, real-time, stealth-capable, user-repairable