Launch of RONDA (ROad Noise Data Acquirer) at internoise 2014
Updated: Nov 12, 2021
RONDA (ROad Noise Data Acquirer) is an instrumented acoustic trailer designed to measure road pavement noise in normal traffic and over long distances (termed 'City Profiling'). It will also find use in certifying new and renovated roads. RONDA was launched in Melbourne at internoise 2014 and is now available for work.
As the principal source of road noise is from the tyre/pavement interface, it is important to understand and quantify pavement noise for both new and renovated roads and to catalogue their ongoing performance. RONDA is a CPX (close proximity) and OBSI (on-board sound intensity) trailer conforming to ISO/DIS 11819-2 and US AASHTO TP-76 respectively. The trailer is of the open frame type without an enclosure as distinct from most other CPX trailers which incorporate an acoustic box enclosure. The advantage of an open frame trailer constructed from circular steel tubing is that unwanted acoustic reflections from an enclosure are avoided. However, precautions need to be taken to ensure that wind noise on the microphone and extraneous noise from other passing vehicles are not a problem.
ISO/DIS 11819-2 specifies the testing of two uniquely different reference tyres, one known as the Avon AV4 (Avon Supervan AV4 195-R14C) and the other the Standard Reference Test Tire or SRTT (Uniroyal Tigerpaw P225/60-R16). The former is representative of tyres used in medium size commercial vehicles and the latter in standard passenger vehicles.
Draft International Standard ISO/DIS 11819-2 is being finalised by committee ISO/TC 43/SC 1/WG 33 chaired by Ulf Sandberg from the Swedish National Road and Transport Research Institute (VTI). A meeting of the committee was held in Melbourne at the conclusion of internoise 2014.