A Sound-Matching-Based Approach for Aircraft Noise Annoyance Alleviation Via MDO

Diez, Matteo; Iemma, Umberto; Marchese, Vincenzo

doi:10.2514/6.2007-3667

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…This approach is intended to shift the focus from 'low-noise' aircraft design, which is the current practice, towards low-annoyance or 'perception-influenced' aircraft design. This is an approach which focuses on influencing aircraft designs towards achieving a more favorable human response to aircraft noise, as presented by Rizzi in [9] and by Diez et al in [10] and [11].…”

Section: Introductionmentioning

confidence: 99%

Objective quantification of perceived differences between measured and synthesized aircraft sounds

Sahai

Snellen

Simons

2018

Aerospace Science and Technology

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This paper presents an approach with which perceived audible differences in aircraft sounds can be quantified and presented in an objective manner. The objective quantification of the subjectively heard audible differences is intended to serve two primary goals. It can firstly enable developers of auralization technology to make the auralized sounds more realistic by identifying in which aspects the synthesized sounds differ from their real-life counterparts and to what extent. The quantification can secondly provide an improved and more detailed means of distinguishing between aircraft sounds in general, beyond the conventional metrics of A-weighted Sound Pressure level (dBA) or Effective Perceived Noise Level (EPNL) used currently to assess aircraft noise. In this study sound quality metrics are used to quantify the differences in aircraft sounds. These metrics are widely used in other industries such as the automotive sector. Audio files of a reference aircraft, made over identical flight paths at a noise monitoring station in the vicinity of Schiphol airport, are compared in terms of both conventional and sound quality metrics for four measured and four auralized audio files. It is observed from the comparison that differences that may appear small in the conventional metrics can be significant in terms of the sound quality metrics. Significant differences in measured and synthesized sounds are observed for the aircraft considered in this study with regards to the tonal content and fluctuations in amplitude that occur over time. The conventional metrics are seen to capture the overall loudness aspect of aircraft sounds, but give no clear information regarding which spectral or temporal characteristics cause the sounds to be perceived as audibly different.

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Section: Introductionmentioning

confidence: 99%

Objective quantification of perceived differences between measured and synthesized aircraft sounds

Sahai

Snellen

Simons

2018

Aerospace Science and Technology

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“…This illustrates how important it is to enhance the acoustic absorption at specific frequencies to improve the quality of sound/noise from an aircraft and hence, its acceptability by the community, i.e., reducing acoustic pollution, even while maintaining the sound level. Such devices would enable the possibility of engineering the noise signature from an aircraft and hence, rethinking the conceptual design procedure by including the "desired noise" as a variable to optimize [49][50][51].…”

Section: Absorption and Dissipationmentioning

confidence: 99%

Acoustic Metamaterials in Aeronautics

et al. 2018

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Metamaterials, man-made composites that are scaled smaller than the wavelength, have demonstrated a huge potential for application in acoustics, allowing the production of sub-wavelength acoustic absorbers, acoustic invisibility, perfect acoustic mirrors and acoustic lenses for hyper focusing, and acoustic illusions and enabling new degrees of freedom in the control of the acoustic field. The zero, or even negative, refractive sound index of metamaterials offers possibilities for the control of acoustic patterns and sound at sub-wavelength scales. Despite the tremendous growth in research on acoustic metamaterials during the last decade, the potential of metamaterial-based technologies in aeronautics has still not been fully explored, and its utilization is still in its infancy. Thus, the principal concepts mentioned above could very well provide a means to develop devices that allow the mitigation of the impact of civil aviation noise on the community. This paper gives a review of the most relevant works on acoustic metamaterials, analyzing them for their potential applicability in aeronautics, and, in this process, identifying possible implementation areas and interesting metabehaviors. It also identifies some technical challenges and possible future directions for research with the goal of unveiling the potential of metamaterials technology in aeronautics.

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“…reducing acoustic pollution while even maintaining the sound level unaltered. Such devices would enable the possibility to engineer the noise signature from an aircraft and hence rethinking the conceptual design procedure including the "desired noise" as a variable to optimize [50][51][52].…”

Section: Absorption and Dissipationmentioning

confidence: 99%

Acoustic Metamaterials in Aeronautics

Palma¹,

Mao²,

Burghignoli³

et al. 2018

Preprint

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Metamaterials, man-made composites scaled smaller than the wavelength, have demonstrated a huge potential in their applications in acoustics, opening up for sub--wavelength acoustic absorbers, acoustic invisibility, perfect acoustic mirrors and acoustic lenses for hyper focusing, acoustic illusions and enabling new degrees of freedom in the control of the acoustic field. The zero, or even negative, refractive sound index of metamaterials offers possibilities in control of the acoustic pattern and sound at sub--wavelength scales. Despite the tremendous growth of the research on acoustic metamaterials during the last decade, the potential of metamaterial-based technologies in aeronautics is still not fully explored and its utilization is still in its infancy. Thus the principal concepts mentioned above could very well provide means to develop devices that would allow the mitigation of the impact of the civil aviation noise on the community. This paper gives a review of the state of the art of the most relevant works on acoustic metamaterials, analyzing them against their potential applicability in aeronautics, and in this process identifying possible implementation areas and interesting metabehaviors. It also identifies some technical challenges and possible future directions for research with the goal of unveiling the potential of metamaterials technologies in aeronautics.

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A Sound-Matching-Based Approach for Aircraft Noise Annoyance Alleviation Via MDO

Cited by 6 publications

References 12 publications

Objective quantification of perceived differences between measured and synthesized aircraft sounds

Objective quantification of perceived differences between measured and synthesized aircraft sounds

Acoustic Metamaterials in Aeronautics

Acoustic Metamaterials in Aeronautics

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