What’s happening in the world of engineering?

Below you’ll find a series of articles that are pertinent to our company and the engineering industry. If you are interested in Xi submitting an article for publication please contact our Managing Director, Dr Mark Paul Buckingham

Sonoma Model One Headphones Now Available to Purchase

The Sonoma Model One is the world’s first high-end headphone to utilise the High Precision Electrostatic Laminate transducer developed by Warwick Audio Technologies in the UK. Xi would like to congratulate the team at Warwick Audio for creating a product which the industry has rated so highly. Our continuous work with Warwick to push the boundaries of audio technology and accelerate the technical development is both a pleasure and a challenge which we embrace.

Xi to Present Peer Reviewed Paper on Tonal Noise Mitigation from Wind Turbines

Xi are pleased to announce that Dr Jutta Stauber of Xi Engineering Consultants (Xi) will be presenting her peer reviewed paper at the ICSV24 conference in London this month. Jutta's paper, Tonal Noise Mitigation on Wind Turbines, comments on the effectiveness of different damping solutions for reducing tonal acoustic emissions from wind turbines. The paper is based off of acoustic and vibration data collected by Xi before and after the installation of damping materials on wind turbines.

Xi Presenting at Acoustics'17 in Boston

Dr Brett Marmo, Xi Engineering's Technical Director, was invited to present his paper on underwater acoustics at the international acoustic event held in Boston this year. Acoustics'17 Boston was hosted by the Acoustical Society of America from the 25th to the 29th of June and is the 173rd Meeting of the Acoustical Society of America.

Xi Featured on Front Cover of COMSOL News 17

The article has come as a result of Xi Engineering's contributions to the product development and design optimisation of new High-Precision Electrostatic Laminate Transducers used to produce the Sonoma Model One headphone. You can read the full article in the COMSOL News 2017 here.

Xi's Latest Sound Mitigation Technology at Wind Turbine Noise 2017

Xi are looking forward to attending and presenting our latest work and research in noise reduction at the biennial international conference on Wind Turbine Noise in Rotterdam this week.

Massachusetts Revise Wind Turbine Tonal Noise Standards

Xi Engineering Consultants have been using their knowledge in wind turbine acoustics to assist clients in Massachusetts with revision to noise regulations regarding tonal noise for wind farms. In the state of Massachusetts noise is a public health concern that falls within the scope of authority for the Massachusetts Department of Environmental Protection (MassDEP) as a form of regulated air pollution.

Scottish Government Draft Energy Policy

Xi Engineering actively work in the energy sector assisting clients with their crucial projects and developments. Our work on Eskdalemuir is specifically referenced in the draft Onshore wind Policy statement and we would ask you to contact us and raise any points you have regarding the document.

Wind Turbine Tonal Noise

A tone is a narrow frequency of sound that is prominent against the neighbouring broadband noise. The tone itself does not require a lot of energy relative to the surrounding broadband noise before it can be picked up by the human ear. It is for this reason that turbines with a tonal noise emission have been given penalties on the acceptable noise emission threshold from the device. In turn this can often lead to curtailment and even shutdown of the turbine.

Amplitude Modulation Noise from Wind Turbines

In 2015 the Department of Energy and Climate Change (DECC) teamed up with a group of industry professionals and the UK Institute of Acoustics (IoA) to produce a comprehensive review of Amplitude Modulation (AM) noise emitted by wind turbines. AM noise from wind turbines adds an additional sound characteristic to the normal wind turbine noise and is known to cause increased annoyance to nearby communities and receptors.

Onshore Wind Policy Statement

Published in January 2017 the Scottish Government’s Onshore Wind Policy Statement directly references Xi Engineering Consultants report that was produced on behalf of the Eskdalemuir Working Group. 'Seismic vibration produced by wind turbines in the Eskdalemuir region Release 2.0 of Substantial Research Project'