The Connection Between SMD Components, the Human Body, MEMS Audio, MICS/MedRadio, and USID

The Connection Between SMD Components, the Human

Body, MEMS Audio, MICS/MedRadio, and USID

Author: Richard Jan Azim Svanberg and ChatGPT

Date: August 12, 2026

Copyright © 2026 Richard Jan Azim Svanberg. All rights reserved.

1. The Connection Between SMD Components and the Human Body

SMD components are small electronic components mounted directly onto a printed circuit board. They

normally do not communicate directly with the human body. The connection is made through an

interface, such as electrodes, biosensors, MEMS microphones, or MEMS speakers, that converts

signals between the body and electronic circuitry.

Human body → sensor/electrode → SMD electronics → amplification/filtering/ADC → MCU/DSP

→ communication

An electrode can record bioelectrical signals from muscles or nerves. SMD circuits can amplify, filter,

and digitize these signals. In the opposite direction, a medically designed stimulator can generate

controlled electrical pulses that are delivered to tissue through electrodes.

2. MEMS Microphone in or Near the Ear

A MEMS microphone is a miniature microelectromechanical acoustic sensor and is commonly available

as an SMD component. When incorporated into an ear-worn device or positioned near the ear canal, it

converts acoustic sound pressure into an electrical or digital signal.

Sound from the body/environment → MEMS microphone → electrical/digital signal → SMD

electronics → MCU/DSP → communication

The signal can then be filtered, amplified, encoded, and transmitted. A microphone detects sound

pressure; it does not directly detect thoughts or neurotransmitters. Bioelectrical activity requires

electrodes or specialized biosensors.

3. MEMS Speaker in the Ear

A MEMS speaker operates in the opposite direction. Electronic circuitry sends an audio signal through

an appropriate MEMS driver, and the speaker converts that signal into mechanical vibration and

acoustic pressure inside the ear canal.

Digital audio data → MCU/DSP → MEMS driver → MEMS speaker → sound → eardrum/inner

ear → auditory nerve → brain

The speaker therefore does not normally send an electrical signal directly into the nervous system. It

produces sound, and the body's natural auditory system converts those vibrations into neural signals.

4. MICS/MedRadio and SMD Electronics

MICS commonly refers to the Medical Implant Communication Service and is related to what is now

generally described within the MedRadio framework. A medical radio system can use an SMD

transceiver together with an antenna, matching network, microcontroller, power-management circuitry,

Richard Jan Azim Svanberg — August 12, 2026 — Page 1and sensor electronics to provide wireless communication between an implanted or body-worn device

and external equipment.

Sensor/electrode → analog front end/ADC → MCU → MICS/MedRadio transceiver → antenna

■ external radio/programmer

MICS/MedRadio provides the wireless communication link and should be distinguished from the sensor,

electrode, MEMS microphone, or MEMS speaker itself.

5. Neurotransmitters and Neurostimulation

Neurotransmitters are chemical signaling molecules used by nerve cells, including dopamine, serotonin,

glutamate, and GABA. Ordinary SMD circuits and MEMS microphones cannot directly measure a

neurotransmitter. A specialized chemical or electrochemical biosensor is required to convert chemical

concentration or activity into an electrical signal that SMD electronics can process.

Neurotransmitter → biosensor → analog front end → ADC → MCU/DSP → storage or wireless

communication

Neurostimulation is different. A stimulator delivers controlled electrical pulses through electrodes to

neural tissue. Such stimulation can influence neural activity and may indirectly affect biological

processes, but this is not the same as electronics transmitting neurotransmitters.

6. USID, Ultrasonic Power, and Backscatter

A conceptual USID (Ultrasound ID) system can use ultrasound as an energy carrier and as a

communication mechanism. An external ultrasonic transmitter can direct acoustic energy toward a

miniature body-worn or implanted device. A piezoelectric or other ultrasonic transducer can convert part

of that acoustic energy into electrical energy for local electronics.

External ultrasonic transmitter → ultrasound through tissue → transducer → rectification/energy

storage → SMD electronics

With backscatter communication, the miniature device does not necessarily need to generate a strong

active radio transmission. Instead, it can modulate how an incoming ultrasonic wave is reflected or

scattered back. An external receiver can analyze the modulated return signal and recover the encoded

information.

7. Combined Conceptual Signal Path

In a combined system, different interfaces can serve different purposes. A MEMS microphone handles

acoustic input, a MEMS speaker provides acoustic output, electrodes handle bioelectrical signals, a

biosensor can measure chemical markers, MICS/MedRadio can provide active radio communication,

and USID can provide ultrasound-based energy transfer and backscatter communication.

Body/sound/chemical signal → sensor/MEMS/electrode → SMD electronics → MCU/DSP →

MICS/MedRadio or USID/backscatter ■ external device

The central principle is that SMD components process electrical signals, while specialized interfaces

translate between electronics and the body's acoustic, electrical, or chemical processes.

8. Medical Device Safety

A real implant or any device electrically coupled to the human body requires substantially more than a

functioning electronic connection. The design must address biocompatibility, appropriate or hermetic

Richard Jan Azim Svanberg — August 12, 2026 — Page 2encapsulation, temperature rise, electrical isolation, charge and current limits, RF and ultrasound

exposure, fail-safe behavior, and applicable medical-device standards. This document is therefore a

technical conceptual description and not an instruction for implantation or human use.

Copyright

Copyright © 2026 Richard Jan Azim Svanberg. This document may not be reproduced or distributed in

its entirety for commercial purposes without the author's permission, subject to applicable law.

Richard Jan Azim Svanberg — August 12, 2026 — Page 3