{"id":11376,"date":"2025-09-25T08:00:36","date_gmt":"2025-09-25T06:00:36","guid":{"rendered":"https:\/\/medtech-ingenieur.de\/?p=11376"},"modified":"2025-10-06T13:14:58","modified_gmt":"2025-10-06T11:14:58","slug":"elektrodermale-aktivitaet-frequenzmessung-medizintechnik","status":"publish","type":"post","link":"https:\/\/medtech-ingenieur.de\/en\/elektrodermale-aktivitaet-frequenzmessung-medizintechnik\/","title":{"rendered":"Understanding Electrodermal Activity \u2013 Frequency Measurement &amp; Applications in Medical Technology"},"content":{"rendered":"<h2><span><span data-attr-link=\"0\" data-attr-rel=\"0\" data-attr-target=\"0\" data-extra_key=\"\" data-option-inline=\"1\" data-shortcode=\"tcb_post_title\" data-shortcode-name=\"Post title\">May I introduce you to EDA \u2013 our owl for electrodermal activity<\/span><\/span><\/h2>\n<p data-pm-slice=\"1 1 []\">Das ist EDA, unsere kleine Eule mit einem besonderen Talent. EDA kann elektrodermale Aktivit\u00e4t (kurz: EDA) messen \u2013 sie erfasst feinste Ver\u00e4nderungen der Hautleitf\u00e4higkeit pr\u00e4zise, zuverl\u00e4ssig und f\u00fcr Forschung &amp; medizinische Anwendungen optimiert.In diesem Beitrag erkl\u00e4ren wir die wichtigsten Grundlagen der EDA-Messung, warum die Wahl der Messfrequenz entscheidend ist, und wie unser System neue M\u00f6glichkeiten in der Medizintechnik schafft.<\/p>\n<p><span><img decoding=\"async\" alt=\"Sensor f\u00fcr elektrodermale Aktivit\u00e4t f\u00fcr medizinische Anwendung in Draufsicht\" data-id=\"11684\" width=\"443\" data-init-width=\"1157\" height=\"323\" data-init-height=\"845\" title=\"Electrodermal activity sensor for medical application in top view\" loading=\"lazy\" src=\"https:\/\/medtech-ingenieur.de\/wp-content\/uploads\/2025\/08\/Bild-1.png\" data-width=\"443\" data-height=\"323\" style=\"aspect-ratio: auto 1157 \/ 845;\"\/><\/span><\/p>\n<p>The shadowy shape of the owl on the sensor consists of two electrodes.<\/p>\n<p><span><img decoding=\"async\" alt=\"Sensor f\u00fcr elektrodermale Aktivit\u00e4t f\u00fcr medizinische Anwendung in schr\u00e4ger Ansicht\" data-id=\"11683\" width=\"443\" data-init-width=\"1037\" height=\"309\" data-init-height=\"725\" title=\"Electrodermal activity sensor for medical application in oblique view\" loading=\"lazy\" src=\"https:\/\/medtech-ingenieur.de\/wp-content\/uploads\/2025\/08\/Bild-3.png\" data-width=\"443\" data-height=\"309\" style=\"aspect-ratio: auto 1037 \/ 725;\"\/><\/span><\/p>\n<p>\u201cEDA the Owl\u201d was born during the development process from the idea of the sensor protecting its patients at night \u2013 because the sensor was originally designed for sleep monitoring and sleep research.<\/p>\n<p>The sensor was developed as part of a funding project in close cooperation with the <a href=\"https:\/\/derma-allergie.med.tum.de\/team\/chefarzt-und-oberaerzte\/prof-dr-dr-med-alexander-zink-mph.html\" target=\"_blank\" style=\"outline: none;\">Clinic and Polyclinic for Dermatology and Allergology at Biederstein<\/a>, Technical University of Munich, Department of Prof. Dr. Dr. Zink.<\/p>\n<p><span><img decoding=\"async\" alt=\"Logo des Bundesministerium f\u00fcr Wirtschaft und Energie und ZIM\" data-id=\"11384\" width=\"363\" data-init-width=\"2560\" height=\"216\" data-init-height=\"1523\" title=\"Logo of the Federal Ministry for Economic Affairs and Energy and ZIM\" loading=\"lazy\" src=\"https:\/\/medtech-ingenieur.de\/wp-content\/uploads\/2025\/07\/ZIM_BMWE_Fz_2025_Office_Farbe_de-scaled.png\" data-width=\"363\" data-height=\"216\" style=\"aspect-ratio: auto 2560 \/ 1523;\"\/><\/span><\/p>\n<h1 data-pm-slice=\"1 1 []\" style=\"\">Was ist elektrodermale Aktivit\u00e4t? &#8211; Grundlagen f\u00fcr die Medizintechnik und Forschung<\/h1>\n<p>EDA stands for electrodermal activity and is a fascinating phenomenon. The human body is a complex system, and just as an ECG can provide insights into heart function, EDA measurement provides insights into stress levels and the activation of the autonomic nervous system.<\/p>\n<p data-pm-slice=\"1 1 []\">You can find more information about this in our previous blog articles, for example:<\/p>\n<ul>\n<li><a href=\"https:\/\/medtech-ingenieur.de\/en\/einflussfaktoren-eda-messung\/\" target=\"_blank\" style=\"outline: none;\">Factors influencing EDA measurement<\/a><\/li>\n<li><a href=\"https:\/\/medtech-ingenieur.de\/en\/elektrodermale-aktivitaet\/\" target=\"_blank\" style=\"outline: none;\">Basics of electrodermal activity<\/a><\/li>\n<li>And in the literature, for example <a href=\"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/014107688107400812\" style=\"outline: none;\" target=\"_blank\">Christie Electrodermal activity in the 1980s: a review<\/a><\/li>\n<\/ul>\n<h1 data-pm-slice=\"1 1 []\" style=\"\">Frequenzverhalten bei EDA-MEssungen &#8211; ein untersch\u00e4tzter Faktor<\/h1>\n<p>For the electrical engineers among us: The electrical parameters of EDA measurements are by no means trivial. There are no standardized measurement frequencies, and the choice of frequency has a significant impact on the measurement result. For historical reasons, other EDA sensors typically use DC or low-frequency AC measurements (&lt; 100 Hz). This was because 100 years ago, when the first measurements were taken, this was the simplest option.<\/p>\n<h3 data-pm-slice=\"1 1 []\">DC measurement (direct current)<\/h3>\n<ul>\n<li>Advantages: Easy to implement, direct measurement of skin conductance.<\/li>\n<li>Nachteile: Elektrodenpolarisation kann auftreten, was zu Drift und Messfehlern f\u00fchrt. Langfristige Messungen sind unzuverl\u00e4ssig.<\/li>\n<li>Typical application: Classical psychophysiological studies, e.g., lie detectors.<\/li>\n<\/ul>\n<h3>Low-frequency alternating current measurement (&lt; 100 Hz)<\/h3>\n<ul>\n<li>Advantages: Reduces electrode polarization compared to DC. Better suited for continuous measurements.<\/li>\n<li 1=\"\" []\"\"=\"\">Disadvantages: Can be affected by external interference (e.g. mains hum at 50\/60 Hz).<\/li>\n<li>At low frequencies, e.g., 8 Hz, comparable results to DC measurements are obtained without their disadvantages.<\/li>\n<\/ul>\n<h3 data-pm-slice=\"1 1 []\">Higher frequencies (&gt; 100 Hz to approx. 1 kHz)<\/h3>\n<ul>\n<li>Advantages: Even lower polarization effects. Better signal quality with short measurement intervals.<\/li>\n<li>Disadvantages: Penetration of the signal into deeper skin layers can lead to other physiological effects. Measurement can become more complex due to increased capacitive effects.<\/li>\n<\/ul>\n<h3 data-pm-slice=\"1 1 []\">High-frequency measurement (e.g. 10 kHz)<\/h3>\n<ul>\n<li>Advantages: Very low polarization. Enables impedance spectroscopy for analyzing different skin layers.<\/li>\n<li>Disadvantages: It no longer measures only skin conductance, but also capacitive and dielectric properties. Data interpretation becomes significantly more complex.<\/li>\n<li>Typical application: Research, e.g., to separate sweat gland activity from skin structure.<\/li>\n<\/ul>\n<p data-pm-slice=\"1 1 []\">Unser Sensor erlaubt eine einstellbare Frequenz von DC &#8211; 30 kHz, ideal f\u00fcr Forschung und Vergleichsstudien. F\u00fcr maximale Vergleichbarkeit empfehlen wir 8 Hz, da dies DC-\u00e4hnliche Ergebnisse liefert, aber f\u00fcr Langzeitmessungen besser geeignet ist.<\/p>\n<h1 data-pm-slice=\"1 1 []\" style=\"\">What makes our EDA sensor special<\/h1>\n<ul>\n<li>Measuring range: 0.3 \u00b5S to 150 \u00b5S (or &lt; 10 k\u03a9 to approx. 3 M\u03a9)<\/li>\n<li>Measurement of real and imaginary parts of impedance<\/li>\n<li>Data storage over several days, readout via Bluetooth or USB<\/li>\n<li>Application in research: e.g., for the detection of allergic reactions \u2013 initial results are promising and are currently being published<\/li>\n<\/ul>\n<p data-empty=\"true\">\u2192 More technical details can be found on our <a data-end=\"3222\" data-start=\"3140\" style=\"outline: none;\" target=\"_blank\" href=\"https:\/\/medtech-ingenieur.de\/en\/eda-sensor\/\">EDA sensor product page<\/a>.<\/p>\n<h3 data-end=\"3275\" data-start=\"3232\" style=\"\"><strong data-end=\"3275\" data-start=\"3236\">First scientific validation<\/strong><\/h3>\n<p data-end=\"3489\" data-start=\"3276\">Im Rahmen einer wissenschaftlichen Studie durch die Arbeitsgruppe von Prof. Dr. Dr. Zink an der Technischen Universit\u00e4t M\u00fcnchen, wurde unser Sensor mit gro\u00dfem Erfolg eingesetzt. Dabei \u00fcberzeugten das Team sowohl Sensor als auch App durch anwenderfreundliches Design, hohe Pr\u00e4zision und zuverl\u00e4ssige Datenqualit\u00e4t. Auf diese erste wissenschaftliche Validierung sind wir besonders stolz.<\/p>\n<p><strong>Our EDA sensor is currently available as a functional sample.<\/strong>If you are interested in integrating it into your medical technology applications, we would be happy to advise you individually on your requirements.<\/p>\n<p>Please use our contact form or write to us directly \u2013 we look forward to speaking with you.<\/p>","protected":false},"excerpt":{"rendered":"<p>Darf ich vorstellen? Das ist EDA \u2013 unsere Eule f\u00fcr elektrodermale Aktivit\u00e4t Das ist EDA, unsere kleine Eule mit einem besonderen Talent. EDA kann elektrodermale Aktivit\u00e4t (kurz: EDA) messen \u2013 sie erfasst feinste Ver\u00e4nderungen der Hautleitf\u00e4higkeit pr\u00e4zise, zuverl\u00e4ssig und f\u00fcr Forschung &amp; medizinische Anwendungen optimiert.In diesem Beitrag erkl\u00e4ren wir die wichtigsten Grundlagen der EDA-Messung, warum [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":11683,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,789,4,716],"tags":[671,699,790,672,791],"class_list":["post-11376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-allgemein","category-elektrodermale-aktivitaet","category-hardware-entwicklung","category-produktion","tag-eda","tag-eda-messung","tag-eda-sensor","tag-elektrodermale-aktivitaet","tag-eule","post-wrapper","thrv_wrapper"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Elektrodermale Aktivit\u00e4t verstehen \u2013 Frequenzmessung &amp; Anwendungen in der Medizintechnik - MEDtech Ingenieur GmbH<\/title>\n<meta name=\"description\" content=\"Wie beeinflusst die Messfrequenz die Ergebnisse der elektrodermalen Aktivit\u00e4t? 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