Grewus Acoustic Products
4 Jan 2019 Grewus comments on draft reversing warning devices regulation (Grewus) TFRA-04-06 2019-01-04 Grewus
4 Jan 2019 Explanations for Grewus proposals on reversing warning device requirements (Grewus) TFRA-04-07 2019-01-04 Grewus
24 Jun 2019 Measurement Report: Ambient Noises and Audible Reverse Warning Devices (Grewus) TFRWS-06-06 2019-06-24 Grewus
5 Sep 2019 Measurement Method Proposal for self-adjusting reverse warning devices (Grewus) TFRWS-08-03 2019-09-05 Grewus
23 Oct 2019 Calculation of sound pressure levels at varying distances (Grewus) TFRWS-09-05 2019-10-23 Grewus
7 Aug 2020 Reversing Warning Systems: Measuring Report-GREWUS "PeTer" free-field tests (Grewus) TFRWS-11-02/Rev.1 2020-08-07 Grewus
16 Oct 2020 Reserving warning sound measurement: 7 m proposal (Grewus) TFRWS-13-03 2020-10-16 Grewus
29 Oct 2020 Verification method for reversing warning with self-adjusting sound level (Grewus) TFRWS-14-03 2020-10-29 Grewus
21 Jun 2021 Audible reversing warning: Comments on the draft text (Grewus) TFRWS-23-08 2021-06-21 Grewus
13 Jul 2021 Audible reversing warnings: Revised proposal for component-level testing (JAPIA, CLEPA, and Grewus) TFRWS-26-02/Rev.1 2021-07-13 JAPIA CLEPA Grewus