Internoise 2013 – Grant reception and paper presentation

This year’s Internoise 2013 took place in Innsbruck, Austria, which is 2h from Salzburg, my hometown. It was a huge succes for me, not only that I received a grant from the I-INCE but also because of the great responses I received on my paper on Theme Park Acoustics and their soundscape (see here).

As austrian representative of the young acousticians network (YAN) I was responsible of organizing a night out in Innsbruck. Doing a lot of online and oral propaganda, the expected number of attendees, 15, could have been raised to 50 people from all around the world (Venezuela, Columbia, Mexico, Brazil, South Africa, UK, Spain, Germany, Austria…)!! Especially thanks to Jamilla Balint for her help. This is what makes conferences so attractive to me, so many equally minded young people meeting each other having one or … beers!

See here some photos:

Abstract for DAGA 2013 submitted and accepted

DAGA 2013 will take place in Meran, Italy. This is the abstract:

Array modes of compact rigid microphone arrays with unconventional shapes

Fabio Kaiser, Franz Zotter, Filippo Fazi

Compact, rigid spherical microphone arrays and their advantages are well-known. Their
signal processing employs a frequency-independent spherical harmonic decomposition of the microphone signals. A valid far field sound field description is obtained by individual
equalization of the resulting signals by filtering. Any subsequent beamforming achieves an
isotropic spatial resolution and is only a frequency-independent combination of signals. This is possible because the spherical harmonics are modes that separate the scattering problem imposed by the rigid sphere. An analytic separation of such modes for other, more complex array shapes (finite cylinder, finite cone, etc.) is not as easy to find. Nevertheless, these array shapes might be beneficial in applications that desire non-isotropic resolution. This work discusses the calculation of modes for rigid array shapes based on their scattering operator. This operator is numerically described by the boundary element method. Subsequent singular value decomposition of the scattered surface sound pressure due to all plane waves yields the modes and their strengths. The approach promises a similarly simple signal processing as employed with spherical arrays, after the quasi-continuous modes are used for array signal decomposition.

Abstract submission for Internoise 2013

Internoise 2013 will take place in Innsbruck from September 15th-18th ( Here’s the abstract we submitted:

Orlando theme park acoustics – A soundscape analysis

Fabio Kaiser and Thorsten Rohde

Theme parks are self-contained environments creating a fantasy world with a very special purpose – entertaining. It is self-evident that sound plays a crucial role in the design of a visitor’s experience. In order to identify the relationship between a park’s architecture, the prevalent activities and the acoustics the soundscape approach is applied. It not only comprises quantitative measures but also perceptual and context-based measures and therefore seems to be most promising for the task. For this research four different theme parks in Orlando, USA, were evaluated during one day each. Soundwalks using binaural microphones as well as standard sound level measurements of single point-of-interest and the daily sound exposure were carried out. Further the sound quality and the context were captured by filling out evaluation forms. These methods helped in identifying characteristics, e.g., of noise sources of a contextual positive quality as well as sources having a rather negative effect. Examples of destructive acoustic design were identified and sound levels of attractions and of the daily exposure were measured that reach critical values. This work also discusses the use of the soundscape analysis for the consulting on the acoustic design of new theme parks.

Paper presentation SMC 2012

Together with Marian Weger I went to the Sound and Music Computing Conference 2012 (SMC) in Copenhagen, Denmark. We presented the work we did on Designing Simulacra. The how and why of electronic replication of mechanical instruments using electronic means and Pure Data. The paper is part of the proceedings.

A description of the project can be found here.


Paper presentation at the Ambisonics Symposium 2012

I presented a paper entitled “Investigations on Cylindrical Microphone Arrays” written together with Hannes Pomberger and Franz Zotter from the IEM. Basically this work deals with the spatial resolution of a rigid cylindrical microphone array in different layouts. We propose a measure for the spatial resolution. Simulations of the array were done using the Boundary Element Mehtod (BEM).

The AES UK/Ambisonics Symposium 2012 took place in York, UK. A small but charming city. York is the home of Ambisonics pioneer Dave Malham. It was an exciting conference to be at!

This paper was part of my master thesis. More information on that see here.

F. Kaiser, H. Pomberger, and F. Zotter, “Investigations on cylindrical microphone arrays”, 4th International Symposium on Ambisonics and Spherical Acoustics, York, UK, March 2012. [pdf] [slides]