Assistive Listening Knowledge Base
  • Trade body guidance (in German)

Induktive Höranlagen: Barrierefreies Planen und Bauen für Hörgeschädigte (Induction loop systems: accessible planning and building for people with hearing loss)

From https://assistivelisteningknowledgebase.org/evidence/zvei-2013-induction-loops/ · record checked 9 October 2026

  • ZVEI (German Electrical and Electronic Manufacturers' Association), sound systems working group
  • ZVEI (Zentralverband Elektrotechnik- und Elektronikindustrie)

Trade body (ZVEI, the German electrical and electronic manufacturers' association, through the sound systems working group of its security division; the PDF metadata names Claus-Peter Sterling as author)

Summary

A German industry association's short guide to planning induction loops that meet EN 60118-4.

Key findings

  • States that in most cases a visitor who switches a hearing aid to T in one of the many existing public loops hears little more, and blames wrong planning of the loop and amplifier; it gives no survey or measurements.
  • Gives the EN 60118-4 requirements as a frequency response within ±3 dB from 100 Hz to 5,000 Hz relative to 1 kHz, a recommended field strength of 100 mA/m ±3 dB and a maximum of 400 mA/m, citing the 1999 German edition, and says these values must be checked and recorded at commissioning.
  • Says ordinary 100 V public-address amplifiers driving a loop cannot meet these requirements because high frequencies are lost, which it gives as the reason older loops gained a reputation for poor quality.
  • Claims that loops commissioned to the standard are "praktisch weitgehend wartungsfrei" (in practice largely maintenance-free).

Limits

Trade body guidance with no data behind its statements about existing loops or maintenance. It cites the 1999 edition of the standard, since replaced by the 2006 and 2014 editions. The document is dated January 2013 ("Stand 1/2013").

Read the original

www.zvei.org/fileadmin/user_upload/Verband/Fachverbaende/Sicherheit/Fachkreis_Beschallungstechnik/LGB-Induktive-Hoeranlagen.pdf

Link checked . We link to the original and do not host copies.

Cited in

Cite this source

ZVEI (German Electrical and Electronic Manufacturers' Association), sound systems working group. Induktive Höranlagen: Barrierefreies Planen und Bauen für Hörgeschädigte (Induction loop systems: accessible planning and building for people with hearing loss). ZVEI (Zentralverband Elektrotechnik- und Elektronikindustrie). January 2013. https://www.zvei.org/fileadmin/user_upload/Verband/Fachverbaende/Sicherheit/Fachkreis_Beschallungstechnik/LGB-Induktive-Hoeranlagen.pdf (accessed 9 October 2026).

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