Abstract
A truck engine excites the periodic noise components
inside the truck cabin. Those harmonic noise components
are related to the engine rotational speed. The noise
component directly related to this speed is called the
1st order. 2nd order is 2 times this frequency, 3rd order
3 times, and so on. Also half-orders, such as 2.5 and 3.5
exist. The sound pressure level of each order varies as a
function of the engine speed and the location in a cabin.
The conventional noise diminishing and treatment measures
rarely affect the orders directly but only certain
frequency ranges. To affect individual orders Active
Noise Control (ANC) may be used. ANC system is able to
produce noise-cancelling anti-orders, which are locked to
the engine speed. Such system has been simulated in this
study using noise data measured in a truck cabin. The
truck is manufactured by Dongfeng Motor Company Ltd.
(DFL). The data has been treated in the simulation
process with a model of the control system. The end
result may be evaluated both numerically and by listening
tests. The possible benefits of the proposed ANC system
include less fatigue to driver and co-driver, no need for
excessive noise insulation in the truck and more
comfortable driving conditions. The challenges in
designing the system are its complexity, reliability, and
potentially high price. These pros and cons are discussed
in the paper and a concept of the system realization is
given.
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | 37th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2008 |
| Publisher | Institute of Acoustics - Chinese Academy of Sciences |
| Pages | 444-449 |
| Volume | 1 |
| ISBN (Print) | 978-1-60560-989-8 |
| Publication status | Published - 2008 |
| MoE publication type | A4 Article in a conference publication |
| Event | 37th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2008 - Shanghai, China Duration: 26 Oct 2008 → 29 Oct 2008 |
Conference
| Conference | 37th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2008 |
|---|---|
| Abbreviated title | INTER-NOISE |
| Country/Territory | China |
| City | Shanghai |
| Period | 26/10/08 → 29/10/08 |