Tyréns AB
www.tyrens.se

Company description

The acoustic department of Tyréns AB is located in the centre of Stockholm with acoustic laboratories in Täby/Stockholm, Sweden. The staff now comprises 20 persons. All members of the technical staff have university degrees related to sound and vibrations together with a thorough experience of consulting for many years.

TYRENS has a complete in-house sound laboratory. The sound laboratory comprises a semi-anechoic room, a reverberation room and a transmission facility. Beside the edge technology like noise and vibration reduction, in-house acoustical laboratory measuring rooms, as well as advanced measuring technology and signal analysis, TYRENS are also active performing assignments within the fields of classical acoustics and noise control. This means assignments including e.g. abatement of noise from road and rail traffic, controlling external and internal transport noise.

Computer calculation capabilities include Statistical Energy Analysis, ray-tracing technique for room acoustical analysis, calculation of structural behaviour using the Finite Element Method FEM.

In the field of rail noise, TYRENS continuously performs measurements, analyses and calculations. TYRENS (under the name Acoustic Control) have been involved as partner in research projects like SQUEAL and CORRUGATION.

TYRENS (under the name Acoustic Control) was coordinator of the EC research projects QCITY (www.qcity.eu) and CityHush (www.cityhush.eu).

Role within the consortium

TYRENS is leader of WP1 & 6. TYRENS will develop and validate the on-board rail roughness and TDR monitoring system in the SLL network. TYRENS will assist KTH with the noise related wear measurements in the Stockholm metro (WP3)

Reason for participation in the project

TYRENS participated in European QCITY project where tools were developed for noise mapping and action planning of road and rail transport (according to the END). TYRENS further participated in the CITYHUSH project where solutions were developed for very low frequency noise mainly from vehicles in stand-still. QUIET-TRACK is the logical follow-up dealing with modelling and solutions for noise from running vehicles in cities where conventional mitigation solutions are not feasible and not effective and where track based solutions are to be developed.

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