New power train concepts in the automobile industry will decisively change the familiar car acoustics. Secondary acoustic noise sources will be unmasked and dominate the driver's sound experience. The most important secondary noise source is the air conditioning (AC) system. Before a favorable AC sound can actively be designed, it is necessary to identify the acoustic noise sources and find means to influence them. This paper focuses on the AC outlet module which is, apart from the control unit, the only part visible to the customer. Typical acoustic spectra of flowed-through outlets show a characteristic tonality at about 3000 Hz. The knowledge of its aeroacoustic source mechanisms, the inherent implications for the customer and corrective measures especially in automobile surroundings has been limited so far. To analyze this phenomenon in detail, a simplified model outlet that shows the basic aeroacoustic behavior of a series production outlet was constructed and investigated.
Acoustic Investigations of HVAC Systems in Vehicle
Sae Technical Papers
SAE 2012 World Congress & Exhibition ; 2012
2012-04-16
Conference paper
English
Acoustic Investigations of HVAC Systems in Vehicle
British Library Conference Proceedings | 2012
|Acoustic Optimization of HVAC Systems
SAE Technical Papers | 1997
|Acoustic optimization of HVAC systems
Automotive engineering | 1997
|Acoustic Optimization of HVAC Systems
British Library Conference Proceedings | 1997
|