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Assessment of a metamaterial-inspired active acoustic liner concept for application to aircraft engine noise reduction

Publications associées (48)

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Design of active Multiple-degrees-of-freedom electroacoustic resonators for use as broadband sound absorbers

Hervé Lissek, Romain Boulandet, Etienne Thierry Jean-Luc Rivet, Sami Driss Karkar

We present a novel control method achieving stable multiple-degrees-of-freedom electroacoustic resonators. Such broadband absorbers, composed of a feedback-controlled electrodynamic loudspeaker, have many practical applications to real-world acoustic engin ...

2017

Spatial dependence of body mass index and exposure to night-time noise in the Geneva urban area

Jérôme Chenal, Stéphane Joost, Idris Guessous, Andrea Salmi

In this study, we calculated the night-noise mean (SonBase 2014, compatible with the EU Environmental Noise Directive) for the 5 classes obtained after computation of Local Indicators of Spatial Association (LISA; Anselin et al 1995) on the BMI of the part ...

2017

A method for reducing noise in measurements taken by a distributed sensor

Marcelo Alfonso Soto Hernandez

According to the present invention there is provided a method of sensing comprising the steps of, (a) acquiring plurality of measurement values using a distributed optical fibre sensor; (b) arranging the plurality of measurement values in a matrix having a ...

2016

An analysis of a gyro-free inertial system for INS/GNSS navigation

Davide Antonio Cucci, Mehran Khaghani

Although the concept of determining angular velocity out of the readings of multiple, displaced accelerometers is not new, apparently it has not yet matured into practical technologies. A new generation of low-cost MEMS accelerometers, which is expected to ...

IEEE2016

Novel Concepts and Recent Progress in Distributed Optical Fiber Sensing

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

Recent techniques open new perspectives for distributed fiber sensing. Pulse coding and multi-dimensional denoising methods result in a >10 dB noise reduction with minor modifications of the experimental layout. ...

OSA2016

Adaptive noise cancelling systems for acoustic wearable device

Mohamed Ben Arbia

Acoustic noise is present in many environments. Such noise is undesirable and provides a poor listening experience. Active noise cancellation refers to the fact of reducing undesired noise using a cancelling signal emitted trough a secondary source. Many m ...

2015

Electronic-health or E-health is a broad area of engineering that leverages transducer, circuit and systems technologies for applications to health management and lifestyle. Scientific challenges relate to the acquisition of accurate medical information fr ...

IEEE2015

2015

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An aggregated 36 Gb/s low power 4-lanes mixed NRZ/multi-tone transceiver for multi-drop bus (MDB) memory interfaces is designed and fabricated in 40nm CMOS technology. The proposed architecture achieves 1 pJ/bit power efficiency in the entire link (TX + RX ...

2015

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We analyzed 1/f noise in silicon nanowire ion-sensitive field-effect transistors (SiNW-ISFETs) having different wire widths ranging from 100 nm to 1 pin and operated under different gating conditions in order to determine the noise source and the sensor ac ...

Elsevier2014