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Validering av forskningsmätrum med avseende på magnetfält
KTH, School of Technology and Health (STH).
KTH, School of Technology and Health (STH).
2015 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

För att kunna bedriva forskning i det nybyggda rummet på Karolinska Universitetssjukhuset vid Rosenlunds Sjukhus krävs det att magnetfäl- tet valideras. Detta är av vikt att undersöka för att kontrollera om det finns möjlighet att installera en teleslinga, samt säkerställa att mag- netfältet som genereras från högtalarna inte blir för stort för framtida forskning på bland annat hörapparater med telespole.

Magnetfältsnivån mättes i tomt rum och med inkopplade högtalare som genererade ett monotont ljud motsvarande talstyrkan hos en vux- en man.

Bakgrundsmagnetfältet var i det stora hela inom gränsvärdena givna av IEC 60118-4 bortsett från ett fåtal mätpunkter. Vid högtalarmät- ningarna visade det sig däremot att flertalet mätpunkter intill högta- larna inte höll sig inom gränsvärdena. Magnetfältet, som genererades av strömmen till högtalarna, avtog snabbt med avståndet. Detta med- för att högtalarnas placering är av betydelse och att det bör tas hänsyn till. 

Abstract [en]

To perform research in a new room at Karolinska University Hospital, Rosenlund Hospital, it has to be validated regarding to magnetic field. This is of importance to verify if it is possible to install a hearing loop, as well to make sure that the magnetic field generated from the speak- ers does not cause problems at future research regarding for example hearing aids with a telecoil.

The magnetic field level was measured in the room when it was empty and with connected speakers generating a monotonous sound corre- sponding the speech level from a grown man.

The background magnetic field level was mainly within the limits given by IEC 60118-4 aside from a few measuring points. The measurements with speakers connected showed that several measuring points close to the speakers were not within the limits. Although the magnetic field, generated by the current to the speakers, decreased rapidly with dis- tance. The placement of the speakers are therefore significant and have to be accounted for. 

Place, publisher, year, edition, pages
2015. , 21 p.
Series
TRITA-STH, 2015:40
Keyword [sv]
Validering av magnetfält
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-169925OAI: oai:DiVA.org:kth-169925DiVA: diva2:826210
Subject / course
Medical Engineering
Educational program
Master of Science in Engineering - Medical Engineering
Supervisors
Examiners
Available from: 2015-06-25 Created: 2015-06-24 Last updated: 2015-06-25Bibliographically approved

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