This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Noise Metrics and Subjective Assessment of Automotive HVAC Systems
Technical Paper
2023-01-1082
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
HVAC systems are of critical importance in ensuring passengers’ thermal comfort inside the car cabin as well as safety requirements for defogging functions. These systems involve various components and subcomponents such as blowers, thermal exchangers or actuators, with a wide range of well-known technologies and also new ones on recently introduced innovative products.
Currently, within established electrification trends worldwide, the HVAC system is becoming the most important embedded system that can induce major contribution of noise and vibration. These NVH issues can emerge through different transfer paths inside the car cabin possibly causing significant discomfort to passengers.
During developments, the NVH issues are mastered and contained by both suppliers according to internal requirements and OEMs according to specifications. However, OEM specifications are mainly defined by overall noise levels and improvements over the years are generally consisting of reducing these specified levels. Furthermore, some HVAC NVH issues may not be well detected when using regular NVH metrics. This raises concerns about the limitations of the regularly used metrics in ensuring specification compliance and, above all, in depicting a subjective assessment at component level.
Throughout a statistical analysis of HVAC systems population, this paper first focuses on the discrepancies between the data provided by traditional NVH metrics and subjective evaluations. Then, a deeper analysis involving psychoacoustic metrics provides a relevance overview of the applied metrics depending on the encountered issues and compared to a subjective assessment. Finally, from a responsibility perspective, these findings raise questions about the relevance of regular metrics used by OEMs and the right way to handle HVAC NVH topics nowadays.
Authors
Topic
Citation
Bennouna, S., Muhr, S., Dutta, S., Liu, L. et al., "Noise Metrics and Subjective Assessment of Automotive HVAC Systems," SAE Technical Paper 2023-01-1082, 2023, https://doi.org/10.4271/2023-01-1082.Also In
References
- Guédel , A. Les ventilateurs : Bruit et techniques de réduction Dunod 2015
- Naji , S. and Ailloud , F. HVAC and Battery Cooling Noises for Hybrid/Electric Cehicles and Its Impacts on the End USER Comfort International Conference on Automotive and Railroad Comfort 2010
- Naji , S. and Ailloud , F. Automotive HVAC Unit Noise Prediction Using Blower Dimensioning Tool International Conference on Automotive and Railroad Comfort , 2008
- Bennouna , S. Caractérisation aéroacoustique d’éléments et associations d’éléments de systèmes de ventilation d’air pour l’automobile France Compiègne 2016
- Bennouna , S. , Moreau , S. , Ville , J. and Cheriaux , O. Aeraulic and Aeroacoustic Experimental Characterization of Academic and Industrial HVAC Flaps International Styrian Noise Vibration and Harshness Conference Graz, Austria 2016
- Legros , M. Synthèse acoustique d’un module de ventilation automobile France Compiègne 2016
- Masullo , M. , Yamauchi , K. , Minori , D. , Cioffi , F. et al. Intercultural Differences in the Perception of HVAC Sound Quality in Car Cabins : From Conventional to Electric Vehicles Applied Sciences 11 11431 2021
- Hamzaoui , N. , Roy , D. , Naji , S. , and Duputel , P. Psychoacoustic Study of Heating, Ventilation and Air Conditioning Unit Euronoise 2006 Tampere, Finland 2006
- Hohls , S. , Biermeier , T. , Blaschke , R. , and Becker , S. Psychoacoustic Analysis of HVAC Noise with Equal Loudness Internoise 2014 Melbourne, Australia 2014
- Minard , A. , Lambourg , C. , and Boussard , P. Perceptual Evaluation of Teh Sound Quality of Car HVAC Systems Internoise 2016 Hamburg, Germany 2016
- Masullo , M. , Yamauchi , K. , Nakatani , Y. , and Maffei , L. HVAC Noise in Car Cabin: A Preleminary Comparison between ICEVs and HEVs 23rd International Congress on Acoustics Aachen, Germany 2019
- Seddeq , H. , Medhat , A. , and Fahim , A. Indoor Noise Measurements Evaluations for HVAC Unit Using Inter-Laboratory Comparisons International Journal of Metrology and Quality Engineering 2011
- Caamaño , E. , Lama , I. , Rousounelos , A. , and Viñas , J. Improved Methodology for Squeak and Rattle Analysis with Abaqus and Correlation with Test Results Simulia Customer Conference 2011
- Beigmoradi , S. , Jahani , K. , and Hajabdollahi , H. Squeak and Rattle Noise Prediction for Trimmed Door of a Car Using Hybrid Statistical Energy - Finite Element Method Analysis ICA 2013 Montreal 2013
- AMIT , K. and Riyazuddin , M. Evaluation of Air-Vent Rattle Noise Severity Using Sound Quality Parameters Inter-noise 2019 Madrid 2019
- Bennouna , S. NVH Integration Impact of Thermal Systems in Serial Vehicle Production SIA Automotive NVH Comfort Le Mans, France 2021