Safety for the visually handicapped

STvarioTON guarantees reliable orientation for visually handicapped persons.

The system emits two clearly differentiable acoustic signals: a permanent orientation signal to find the pedestrian crossing and a GO signal, which signals the green phase for pedestrians.

The system components can be installed in any housing in the Stvario series, but can also be installed in other commonly available traffic lights.

STvarioTON is part of a distinctive and powerful technical system. The acoustic signal transmitter integrates seamlessly into the high standard of our development STvario.

It has been tested by the TÜV and complies with the RiLSA (Guidelines for traffic light systems) and also with DIN 32981.

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The functions of the STvarioTON have been exactly matched to practical requirements. In order to enable clear orientation for visually handicapped persons, the system sends two concise standard signals, which are easy to tell apart:

• An electronic pulse generator generates a sound for this purpose with a pulse frequency of 1.2 Hz. The intensity of this sound regulates itself automatically to suit the noise level of the surroundings.
• The acoustic GO signal only sounds during the green phase of the traffic light. It is transmitted with a frequency of 880 Hz and a pulse frequency of 4 Hz. The acoustic pressure level is automatically adapted to suit the noise level in the surroundings. 
• The modular system of the STvario is particularly suitable for the operation of the acoustic signal transmitter. In this case, the combination of acoustic signal transmitter with the pedestrian signal offers optimal alignment to the pedestrian crossing. The technically mature design, which unites the optical and acoustic signals for pedestrians into one common system, also makes installation and maintenance easier. Not least, the acoustic signal transmitter is ideally accommodated in the Stvario housing: the polycarbonate plastic used is extremely robust, resistant to impact and weather and thus offers excellent protection for the highly developed technology. The STvario can incidentally also be mounted as a separate unit if required.

The acoustic signal transmitter has been tested by the TÜV and complies with the RiLSA and is designed in accordance with DIN 32981.

An electronic pulse generator produces an orientation signal with a pulse frequency of 1.2 Hz to enable the signal mast to be found.

STvarioTON adapts the volume of the orientation signal automatically to suit the noise level of the surroundings. It transmits the GO signal, also automatically adapted to suit the local noise level, with a sound frequency of 880 Hz. The robust polycarbonate housing protects the acoustic signal transmitter from impact and the effects of weather.

Tested quality

The orientation and GO signals comply with the requirements of DIN 32981 and Müller-BBM.

The functional testing, defect simulation and the technical construction passed the tests according to DIN VDE 0832/3.90 and DIN 32981.

Climatic testing has been carried out from -25°C to +75°C.

Additional equipment STvarioIR

As optional additional equipment, Stührenberg has developed an infrared remote control for the acoustic signal transmitter.

STvarioIR makes it possible to adjust and save the volume values (minimum/maximum) and the environment-dependant HUB (crossing distance adjustment) simply by using the remote control.

The menu-led remote control has a range of 18 m, so that every acoustic signal transmitter can be reached and adjusted without problems.