Switzerland and the Principality of Liechtenstein
Radio Interface Regulation

784.101.21 / RIR10091)
Radio microphones and ALD

RIR1009-22
Inductive loop systems
0.1 - 9 kHz
120 dBuA/m
Edition 1.0 / 01.01.2026

Nr Parameter2)DescriptionComments
1Radiocommunication service--
2ApplicationRadio microphones and ALDInductive loop systems intended to assist the hearing impaired. Antenna size of < 1/20 λ.
3Frequency band100 - 9000 Hz-
4Channelling--
5Modulation / Occupied bandwidth--
6Direction / Separation--
7Transmit power / Power density120 dBµA/m at 10 m-
8Channel access and occupation rules--
9Authorisation regimeSwitzerland: License exempt.
Liechtenstein: General authorisation.		Operation on NIB / NPB. (Non interference basis / non protection basis).
10Additional essential requirements--
11Frequency planning assumptions--
12Planned changes--
13ReferenceEN 303 348 /-/ ERC/REC 70-03, Annex 10.Effective use of spectrum / ECC Decisions / ECC Recommendations.
14Notification numberG/TBT/N/CHE/298
2025/9021/CH		-
15Remarks--

Normative part: 1 to 11
Informative part: Nr 12 to 15

1) RIR for similar and/or other applications are available under: https://www.bakom.admin.ch/en/technical-interface-regulations
2) For explanations and legal status, please refer to basis document 784.101.21 / RIR0000