Acoustic Metasurface-Aided Broadband Noise Reduction in Automobile Induced by Tire-Pavement Interaction

Abstract

The primary noise sources of the vehicle are the engine, exhaust, aeroacoustic noise, and tire–pavement interaction. Noise generated by the first three factors can be reduced by replacing the combustion engine with an electric motor and optimizing aerodynamic design. Currently, a dominant noise within automobiles occurs from the tire–pavement interaction over a speed of 70–80 km/hr. Most noise suppression efforts aim to use sound absorbers and cavity resonators to narrow the bandwidth of acoustic frequencies using foams. We demonstrate a technique utilizing acoustic metasurfaces (AMSes) with high reflective characteristics using relatively lightweight materials for noise reduction without any change in mechanical strength or weight of the tire. A simple technique is demonstrated that utilizes acoustic metalayers with high reflective characteristics using relatively lightweight materials for noise reduction without any change in mechanical strength or weight of the tire. The proposed design can significantly reduce the noise arising from tire–pavement interaction over a broadband of acoustic frequencies under 1000 Hz and over a wide range of vehicle speeds using a negative effective dynamic mass density approach. The experiment demonstrated that the sound transmission loss of AMSes is 2–5 dB larger than the acoustic foam near the cavity mode, at 200–300 Hz. The proposed approach can be extended to the generalized area of acoustic and vibration isolation.

Experimental design and adaptive modulation of piezoelectric cantilever phononic crystals for vibration attenuation in vehicle subframes

“…However, vibration or noise suppression effects subjected to large wavelength elastic waves below that frequency range are limited. Given the inherent properties of traditional acoustic materials [7,8], there is a promising potential for the development of acoustic composite structures that are lightweight and easily adjustable [9,10]. Aiming at complicated automotive structures, the research works on existing acoustic metamaterials are more focused on the theoretical calculation or sample production [11,12]; hence, it is urgent to explore the design of artificial composite materials that meet different driving conditions.…”

Research on the characteristics of EV interior sound quality and its dynamic active control system design and development un-der accelerated driving conditions

“…In addition, Heo H [ 17 ] used acoustic metal layers with high reflective properties and relatively light materials to effectively suppress the noise of automobile tires when driving. Cao Y et al [ 18 ] studied the generation mechanism and frequency characteristics of intake noise of battery cooling system of electric vehicle, reduced intake noise by placing sound-absorbing materials in ventilation pipes, and verified its good noise reduction effect through subjective evaluation.…”

Analysis of Vibration Characteristics and Influencing Factors of Complex Tread Pattern Tires Based on Finite Element Method

“…The vibration characteristics of tires have a significant impact on the noise, smoothness, and even safety of vehicles. Studying the vibration characteristics and influencing factors of tires is beneficial for reducing car noise and improving comfort [3]. The modal feature analysis of tires can help to better understand the vibration frequency characteristics, which plays a key role in fault diagnosis when matching tires with vehicles and avoiding resonance peaks of vehicle-related components [4][5][6].…”