Timber terraced housing: Assessment of transverse stability

The transverse stability of timber terraced houses can be provided by CLT stability walls where decoupled timber terraced houses are preferred to meet acoustic requirements leading to rather large thicknesses for the CLT stability walls and many large connections for anchorage to the foundation. The main goal of this research was to investigate...

Numerical Analysis of Tonal Noise Emissions from Open and Shrouded Contra-Rotating Propellers

As market growth projections for Urban Air Mobility vehicles (UAMs) skyrocket, their presence in urban environments is likely to become increasingly prevalent, as will their noise. This creates a disturbance to both humans and wildlife, previously unaffected by aircraft noise. Further reinforcing the concern is the new multi-rotor designs, which...

Auralisation of Modelled Wind Turbine Noise for Psychoacoustic Listening Experiments: Development and Validation of the Wind Turbine Auralisation Tool WinTAur

Wind turbine noise is one of the grand challenges in the public acceptance of onshore wind farm projects. The field of psychoacoustics identifies the auralisation of wind turbine noise as a link between technical design and annoyance estimation. There is currently limited work on the auralisation of wind turbine noise, and none targets an...

Improving accuracy of sound reflection estimation using neural networks

In this paper, we present a study to improve using neural networks for acoustic reflection localization. Our study focuses on the reimplementation of the proposed neural network model by Bologni et al. and investigates the effect of adding a third microphone to the microphone array. We reimplemented and trained the neural network using the same...

The Modular Soundscape: Sound as an architectural domain

Noise pollution is a contemporary problem that developed through urbanisation and industrialization. The consequences of this issue directly influence the health of human beings, as their perception of noise leads to certain behavioural responses. By addressing this issue in a strategic way, residential housing can still be created in noise...

Embodiment design of a hi-fi speaker with a full range cardioid radiation pattern

This master thesis described the embodiment design process of a new full-range directional hi-fi loudspeaker using a cardioid radiation pattern for Dutch & Dutch. Directional speakers minimize room boundary reflections to ensure the listener listens only to the direct sound waves coming from the speaker instead of also listening to the non...

Strengthening monumental timber floors with a reversible intervention to accommodate acoustic measures

For centuries timber has been the most commonly used material for constructions. All over the world examples of timber structures that date back from a few centuries are still standing today. The Netherlands feature about 60,000 national monuments with internally timber structures. These timber structures often need strengthening due to...

Acoustic Virtual Reality: An introductory research for application

With the advent of virtual reality (VR), the process of (re) designing buildings and rooms becomes more accessible in 3D. The software is able to design spaces, whilst standing in the environment itself with directly high render qualities. This offers a great opportunity for a better design process between architect, companies and clients.

Underwater Noise: An analysis to the relevant criteria for positioning a bubble curtain

Wind turbines are growing in size and therefore their foundations, become larger as well. Additionally, they are placed in deeper waters. This results in the industry being at the limit of underwater noise levels generated by impact piling during the installation phase of monopiles. The most common installation method for monopiles is impact...

The Sound Bending Project: Sound Responsive Surface for optimizing the acoustic perfromance to enhance the user experience

The power of sound is immense. It provides an immersive experience for the user in many different forms, such as noise, melodies, voices or even a song. It is a tricky genre unlike light and temperature, and is highly complex to predict and control the user behavior in terms of sound. Thus, the intention is to correct the acoustics as a post...

Experimental Investigation of Fan-Stage Interaction Noise of a Turbofan Engine

Future designs of turbofan engines are heading towards High By-Pass Ratios (HBPR) to satisfy the requirements of improving the overall efficiency, but there is an inherent acoustic penalty related to this. An increase in the by-pass ratio imposes structural constraints on the engine leading to a decrease in the axial distance between the rotor...

Urban Amplifiers

This graduation project explores the act of listening to “noise”, to develop a new critical attitude to understanding sounds of the contemporary city. The essential aim is to create ears which separate, abstract and re-organize the myriad of sounds of the environment, which often ends up in a cacophony. The sounds of the surroundings are...

Microperforated glass: Turning the innovation into a marketable product

The potentials of glass as building material are continuously researched by experts in the field. With this thesis, glass, as sound absorber in room acoustics is presented. This function can be achieved by exploiting microperforation to glass, which is still a complicated and expensive process today. The innovative concept of a glass sound...

Acoustic Design of Small Home Studios: Providing a method for the design of a small non-professional home music production studio

Starting music producers with small studio rooms encounter several problems with the acoustic properties of their room in relation to the mix of their music. A method is developed to analyze the acoustic design for the room with the use of simulation tools and measurement tools.

Deployable sound-absorbing unit for open-plan offices

In this industrialized world, technology has invaded our life in such a level where behind every product a complex manufacturing process with high transportation costs being hidden. Designing a product itself is not enough anymore; the whole manufacturing procedure needs to be included in the design.<br/><br/>Especially when product design meets...

The design of a multifunctional exhibition hall: When acoustics integrate with the structural design

This report describes the development of a multifunctional building and the research that supports the design. The question was “what are the characteristics of a multifunctional exhibition hall of which the structural design is integrated with the variable acoustical design and of which the acoustic properties are used as decisive factors in...

Muzikale beleving binnen & buiten

Design of a concert hall in Amsterdam. The concert hall can be opened to create an open air concert. Acoustics is integrated in the design from beginning to end with modelling, calculations and optimalization.