A multi-harmonic amplitude and relative-phase controller for active sound quality control

Multiple target sound quality balance for hybrid electric powertrain noise

“…Wang et al [35] coin terms such as rattle and creak to auditory stimuli that elucidate Roughness. On the other hand, NVH specialists in the automotive industry do take advantage of this perception for inducing, or even enhancing, sensations like sportiveness or powerfulness of ICE noises perceived at the interior of passenger cars [28,30,33,36,38,61].…”

“…The possibility for tailoring the residual powertrain noise to provide the driver and passengers with relevant auditory information on the operation regime of the vehicle [23][24][25][26][27], or even for enhancing customer perceptions [28,29] of, e.g. vehicle quality, powerfulness, sportiveness, luxury, reliability quietness, among others [30], also enables the manufacturers to boost their products with unique and distinctive sound marks [31][32][33][34][35][36]. At that point, SQ techniques come in handy for supporting auditory-oriented procedures, since they bridge the gap between objective vibro-acoustics and the human auditory response, by means of models that quantify auditory perceptions.…”

“…At that point, SQ techniques come in handy for supporting auditory-oriented procedures, since they bridge the gap between objective vibro-acoustics and the human auditory response, by means of models that quantify auditory perceptions. Whereas it is still possible to cope with the unusual amount of harmonics and spectral crossings amongst them in the hybrid electric powertrain noise, by simply following SQ techniques applied for ICE noise, the fact that its spectrum spreads over a wider bandwidth, sometimes in excess of 4 kHz, does demand the inclusion of more auditory dimensions to the problem, namely other than the widely used low-frequency Loudness [28,34,[36][37][38][39][40][41][42][43] and Roughness [28, 34-39, 42, 44-46]. In fact, some recent works on NVH aspects of HEVs [1,6,47] put forward the need for developing SQ approaches that face tonal, narrowband and sharp sounds, which are the novel high-frequency occurrences in the noise that come with integration of the EM in the powertrain.…”

“…In particular, the noise emitted by hybrid electric powertrains, which is structure borne and measured at a number of relevant locations in the vehicle cabin, is tackled through an innovative multichannel distributed algorithm that delivers independent-zone active sound profiling [49]. Contrary to current active noise equalization (ANE) [24,25,[27][28][29] and active sound quality control (ASQC) strategies [26,32,33,36,39,50,51], where the improvement of the soundscape comes as a mere e↵ect of applying a few operation modes, e.g. cancellation, reduction, or amplification, the proposed methodology features a multi-objective optimization stage, which provides the NVH specialist with a variety of optimal solutions, given in terms of amplitude levels that should be attained in the sound, so as to provide the passengers with the exact, desired SQ levels.…”

Multiple-harmonic amplitude and phase control method for active noise and vibration reshaping

“…For example, in psychoacoustics and SVQC, except for loudness (the amplitude), auditory roughness is also a very important descriptor. There are studies that show that the phase difference can become audible and thus clearly affect the roughness perception, even when keeping the amplitude spectrum constant (Pressnitzer and McAdams, 1999; Fastl and Zwicker, 2007; Mosquera-Sanchez and De Oliveira, 2014). The other drawback is that they are unable to control the frequency components that are not included in the primary noise (i.e.…”