RF Standards and Equipment Safety — Silentsystem

Silentsystem wireless audio equipment for silent disco, conferences, museums, guided tours and multichannel formats is designed for professional use and supported by technical documentation covering radio frequency, acoustic safety, electromagnetic compatibility and product safety.

Purpose of this page: to provide a concise and clear overview of the technical standards relating to RF headphones, wireless transmitters and the applicable compliance verifications for Silentsystem equipment.

Wireless audio equipment for professional use

In event, conference and silent experience contexts, signal stability, multichannel audio management and the ability to serve a large number of users simultaneously are central requirements. For this reason, professional systems use dedicated RF architectures, which differ from consumer Bluetooth headphones designed primarily for personal use.

The technical test reports for Silentsystem RF headphones and Silentsystem transmitters indicate systems operating on three channels in the 863–865 MHz band, with operating frequencies of 863.1 MHz, 863.8 MHz and 864.9 MHz, using FM modulation.

RF standards applied to wireless headphones

Silentsystem RF wireless headphones have been tested to the standard ETSI EN 301 357 V2.1.1, with a Pass result, as part of the radio verification for CE marking under the RED Directive 2014/53/EU. The test report identifies the model under test, the model family, the 863–865 MHz operating band, the three operating channels and the integrated antenna.

This standard covers cordless wireless audio devices and represents an important reference for assessing the correct management of the radio spectrum in systems intended for professional use.

Exposure to electromagnetic fields

Silentsystem RF wireless headphones have also been tested to the standards EN 62479:2010 and EN 50663:2017, relating to the assessment of human exposure to electromagnetic fields, with a Pass result. The report lists Silentsystem RF wireless headphones as the product under test and identifies LEM International S.r.l. as the applicant.

This documentation is particularly useful for corporate clients, public bodies, event organisers and venues that require more detailed technical information on the safety profile of the equipment.

Acoustic safety of headphones

The headphones have also been tested to the standard EN 50332-2:2013, relating to the maximum sound pressure level of personal audio devices. The report indicates that the test items are compliant and references the safeguard limits against acoustic energy sources set out in the EN/IEC 62368-1 family.

In a professional system this aspect is relevant because the listening experience must remain engaging while at the same time being controlled and consistent with good hearing safety practices.

Electromagnetic compatibility of transmitters

Silentsystem RF wireless transmitters have been tested to the standards ETSI EN 301 489-1, ETSI EN 301 489-9 and ETSI EN 301 489-17, with a Pass result. The documentation covers tests relating to electromagnetic compatibility, radiated emissions, conducted emissions and immunity tests.

In practice, electromagnetic compatibility contributes to greater system reliability in contexts where other electronic devices, power supplies, cabling and radio sources are present.

Radio standards applied to transmitters

Silentsystem TX-series transmitters have also been tested to ETSI EN 301 357 V2.1.1, with a Pass result, again in relation to the 863–865 MHz operating band and the three channels 863.1 MHz, 863.8 MHz and 864.9 MHz.

This confirms the technical consistency of the RF platform for multichannel wireless audio applications in a professional context.

Electrical safety of transmitters

The transmitters have been tested to the standard EN IEC 62368-1:2020+A11:2020, a reference for the safety of audio/video, ICT and communication technology equipment, with a positive result recorded in the report. The document addresses aspects relating to electrical safety, thermal hazards, mechanical hazards, markings and safety instructions.

The report also specifies that the product meets the requirements of the standard and is considered a transportable device for use in a dry environment.

Bluetooth function on some transmitters

Some transmitters, such as the test model TX-350 CH3 BT, also include a Bluetooth 5.2 function. The dedicated reports indicate testing to ETSI EN 300 328 V2.2.2 for both Bluetooth Low Energy and Classic Bluetooth, in the 2.4 GHz band, with a Pass result. It is important to emphasise that this function may serve as an input or operational support, but in event systems the audio distribution to many headphones remains handled by the dedicated RF architecture.

Technical approach and operational reliability

When evaluating professional wireless audio equipment, what matters is not only the ability to transmit audio to headphones. Signal stability, channel management, the quality of the RF design, compliance with applicable standards and the availability of clear technical documentation are equally important.

In this sense, the availability of reports covering radio frequency, electromagnetic field exposure, acoustic safety, electromagnetic compatibility and product safety provides a more solid technical foundation for organisers, agencies, venues, museums, companies and industry professionals.