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Comparative Evaluation of Acoustical Noise Levels of Soleq Evcort EV and ICE Counterpart
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Abstract
The Idaho National Engineering Laboratory (INEL) evaluates EV propulsion systems and components for the U. S. Department of Energy (DOE) Electric and Hybrid Vehicle (EHV) Program. This paper describes an INEL study which compares the exterior and interior acoustic noise levels of an electric vehicle to its internal combustion engine (ICE) counterpart base vehicle, under various operating conditions.
The electric vehicle was a converted 1988 Ford Escort station wagon, retrofitted with a DC electric powertrain developed by Soleq Corporation. A comparably-equipped gasoline-fueled ICE-powered Ford Escort station wagon provided the baseline acoustic noise levels with which to compare the electric vehicle. Measurements of the interior and exterior noise levels were obtained using a Bruel and Kjaer (B&K) Type 2231 Modular Precision Sound Level Meter. The tests were conducted in accordance with applicable Society of Automotive Engineer's (SAE) standard practices (1, 2, 3, 4, 5, 6, 7 and 8)* at Chrysler's Arizona Proving Grounds in Wittmann, Arizona.
The results indicate that radiated interior and exterior acoustic noise levels of the electric vehicle were noticeably quieter under acceleration and idle conditions. However, under constant speed operation the electric and the ICE exhibited essentially equivalent interior and exterior noise levels.
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MacDowall, R., "Comparative Evaluation of Acoustical Noise Levels of Soleq Evcort EV and ICE Counterpart," SAE Technical Paper 900138, 1990, https://doi.org/10.4271/900138.Also In
References
- Society of Automotive Engineers Instrumentation for Measuring Acoustic Impulses Within Vehicles -SAE J247 February 1987
- Society of Automotive Engineers Qualifying a Sound Data Acquisition System -SAE J184 August 1987
- Society of Automotive Engineers Sound Level for Passenger Cars and Light Trucks -SAE J986 February 1987
- Society of Automotive Engineers Maximum Sound Level for Passenger Cars and Light Trucks -SAE J1030 February 1987
- Society of Automotive Engineers Measurement of Interior Sound Levels of Light Vehicles -SAE J1477 January 1986
- Society of Automotive Engineers Measurement of Light Vehicle Exhaust Sound Level Under Stationary Conditions -SAE J1169 February 1987
- Society of Automotive Engineers Measurement of Noise Emitted by Accelerating Highway Vehicles -SAE J1470 February 1987
- Society of Automotive Engineers Sound Level of Highway Truck Tires -SAE J57 February 1987