Calculates pass by sounds from cars. No recordings! – Just calculated sounds from my pass by algorithm.
For whom is it?
Well, first of all for me :-) - But everyone can use it. However, I think its most fun for us already working with road noise acoustics.
How it all started:
This project started out as a small project 2012 in order to have something useful to do during travels to work and on flights. I started to write the road noise auralization algorithm in SciLab and Octave but both these languages were to slow and to memory consuming so I went over to java. Java has support for multithreading and with java, one gets somewhere faster than for instance c/c++. The algorithm in OpenRS is easily modified in order to work in real time. However, that can only be done with “fast” CPUs.
What is does:
Noise in 1/3rd octave bands and tones are added together according to a calculation model. The source data is based on measurements with the Close Proximity Method. If you happen to have CPX data you can add them in the CPX database in this software to calculate pass by noises from your CPX data.
If you want to get involved with this project please get in touch with me.
References:
HRTF FROM:
C. Phillip Brown and Richard O. Duda ” AN EFFICIENT HRTF MODEL FOR 3-D SOUND” Department of Electrical Engineering - University of Maryland. 1997 SCREENING AND GROUNDEFFECT FROM:
ISO 9613-2:1996 Acoustics -- Attenuation of sound during propagation outdoors -- Part 2: General method of calculation ATTENUATION AND GROUNDABSORPTION FROM:
B. Plovsing, J. Kragh, ‘Nord2000. Comprehensive Outdoor Sound Propagation Model’. Part 1: Propagation in an Atmosphere without Significant Refraction’, DELTA Acoustics & Vibration Report AV 1849/00, Lyngby 2000 and part 2: ‘Propagation in an Atmosphere with Refraction’, DELTA Acoustics & Vibration Report AV 1851/00, Lyngby ENGINE HARMONICS FROM:
Jan JAGLA SAMPLE-BASED ENGINE NOISE SYNTHESIS USING A HARMONIC SYNCHRONOUS OVERLAP-AND-ADD METHOD "IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012), Kyoto : Japan (2012)" INSPIRATION FROM:
Robert Smyth et.al "Simulation of Vehicle Noise in the Virtual City"
Conferance paper - INTERNOISE 2010 │ JUNE 13-16 │ LISBON │ PORTUGAL
Last edit: Gustav Grundfelt 2016-03-23
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
OpenRoadSynth-wiki
What it does:
Calculates pass by sounds from cars. No recordings! – Just calculated sounds from my pass by algorithm.
For whom is it?
Well, first of all for me :-) - But everyone can use it. However, I think its most fun for us already working with road noise acoustics.
How it all started:
This project started out as a small project 2012 in order to have something useful to do during travels to work and on flights. I started to write the road noise auralization algorithm in SciLab and Octave but both these languages were to slow and to memory consuming so I went over to java. Java has support for multithreading and with java, one gets somewhere faster than for instance c/c++. The algorithm in OpenRS is easily modified in order to work in real time. However, that can only be done with “fast” CPUs.
What is does:
Noise in 1/3rd octave bands and tones are added together according to a calculation model. The source data is based on measurements with the Close Proximity Method. If you happen to have CPX data you can add them in the CPX database in this software to calculate pass by noises from your CPX data.
If you want to get involved with this project please get in touch with me.
References:
HRTF FROM:
C. Phillip Brown and Richard O. Duda ” AN EFFICIENT HRTF MODEL FOR 3-D SOUND” Department of Electrical Engineering - University of Maryland. 1997
SCREENING AND GROUNDEFFECT FROM:
ISO 9613-2:1996 Acoustics -- Attenuation of sound during propagation outdoors -- Part 2: General method of calculation
ATTENUATION AND GROUNDABSORPTION FROM:
B. Plovsing, J. Kragh, ‘Nord2000. Comprehensive Outdoor Sound Propagation Model’. Part 1: Propagation in an Atmosphere without Significant Refraction’, DELTA Acoustics & Vibration Report AV 1849/00, Lyngby 2000 and part 2: ‘Propagation in an Atmosphere with Refraction’, DELTA Acoustics & Vibration Report AV 1851/00, Lyngby
ENGINE HARMONICS FROM:
Jan JAGLA SAMPLE-BASED ENGINE NOISE SYNTHESIS USING A HARMONIC SYNCHRONOUS OVERLAP-AND-ADD METHOD "IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012), Kyoto : Japan (2012)"
INSPIRATION FROM:
Robert Smyth et.al "Simulation of Vehicle Noise in the Virtual City"
Conferance paper - INTERNOISE 2010 │ JUNE 13-16 │ LISBON │ PORTUGAL
Last edit: Gustav Grundfelt 2016-03-23