Studies on the Experimental Validation
of the Theoretical Static Noise Field
in the Neighbourhood of Agricultural
Tractors
Petru Cardei, Cristian Sorica, Valentin Vladut, and Mihai Matache
Abstract The article presents results on the measurement and modelling of the field
of noise generated by agricultural tractors in aggregate with agricultural machines
operated by human operators. The data required to construct the field level noise
level in the vicinity of the tractors at work are obtained by measurement. The results,
both the measured and the theoretical ones, are finally used to verify the compliance
with the occupational safety standards, taking into account the specific activities
carried out by the staff working on the trailed agricultural machines. The field of
noise intensity level is also worthwhile in the design of agricultural machinery and
in the estimation of the level of noise received by human personnel working on other
equipment trailed by the tractor under consideration, other than those appearing in
this article. Also, important references are made to the expression of the logarithmic
term, which generally characterizes the variation of the noise intensity level based
on the distance to the source.
1 Introduction
Among the ways of approaching the problem of the propagation of acoustic waves
in space and their effects on the environment, from the engineering point of view
and from the theoretical point of view, there are, at least apparently, quite large
differences. This issue has been addressed in previous papers, [1–5].
In general, traction noise measurement standards focus on effects on the tractor
driver. The effects of the tractor’s noise on the environment are considered to be
minor, given the working regime of the tractor, which is generally in continuous
movement. In this way, the impact of an environmental objective takes place for a
relatively negligible time relative to the allowable times in the standards for the noise
intensities caused by these machines.
P. Cardei (B) · C. Sorica · V. Vladut · M. Matache
INMA, Bucharest 013813, Romania
e-mail: petru_cardei@yahoo.com
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_17
173
of the Theoretical Static Noise Field
in the Neighbourhood of Agricultural
Tractors
Petru Cardei, Cristian Sorica, Valentin Vladut, and Mihai Matache
Abstract The article presents results on the measurement and modelling of the field
of noise generated by agricultural tractors in aggregate with agricultural machines
operated by human operators. The data required to construct the field level noise
level in the vicinity of the tractors at work are obtained by measurement. The results,
both the measured and the theoretical ones, are finally used to verify the compliance
with the occupational safety standards, taking into account the specific activities
carried out by the staff working on the trailed agricultural machines. The field of
noise intensity level is also worthwhile in the design of agricultural machinery and
in the estimation of the level of noise received by human personnel working on other
equipment trailed by the tractor under consideration, other than those appearing in
this article. Also, important references are made to the expression of the logarithmic
term, which generally characterizes the variation of the noise intensity level based
on the distance to the source.
1 Introduction
Among the ways of approaching the problem of the propagation of acoustic waves
in space and their effects on the environment, from the engineering point of view
and from the theoretical point of view, there are, at least apparently, quite large
differences. This issue has been addressed in previous papers, [1–5].
In general, traction noise measurement standards focus on effects on the tractor
driver. The effects of the tractor’s noise on the environment are considered to be
minor, given the working regime of the tractor, which is generally in continuous
movement. In this way, the impact of an environmental objective takes place for a
relatively negligible time relative to the allowable times in the standards for the noise
intensities caused by these machines.
P. Cardei (B) · C. Sorica · V. Vladut · M. Matache
INMA, Bucharest 013813, Romania
e-mail: petru_cardei@yahoo.com
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_17
173