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All Outputs (57)

Acoustic based condition monitoring of turbine blades (2011)
Presentation / Conference
Fazenda, B. (2011, July). Acoustic based condition monitoring of turbine blades. Presented at 18th International Congress on Sound and Vibration, Rio de Janeiro, Brazil

An initial investigation into the performance of acoustic condition monitoring in the detection of structural faults in turbine blades has been carried out. The focus is to design a non-contact condition monitoring method which might allow the detect... Read More about Acoustic based condition monitoring of turbine blades.

A simple multiband approach for solving frequency dependent problems in numerical time domain methods (2011)
Presentation / Conference
Sheaffer, J., Fazenda, B., Murphy, D., & Angus, J. (2011, June). A simple multiband approach for solving frequency dependent problems in numerical time domain methods. Presented at Forum Acusticum, Aalborg, Denmark

With the rapid growth of computational power and recent advances in GP-GPU technology, numerical time domain methods are becoming increasingly popular for room acoustics applications due to their accuracy, simplicity and ease of implementation.... Read More about A simple multiband approach for solving frequency dependent problems in numerical time domain methods.

Characterisation of the directionality of reflections in small room acoustics (2009)
Presentation / Conference
Romero, J., Fazenda, B., & Atmoko, H. (2009, November). Characterisation of the directionality of reflections in small room acoustics. Presented at Reproduced sound 25, Brighton

This paper investigates the extraction and analysis of temporal and spatial distribution of early sound decay. A method based on B-format signals is adapted for small rooms. It can map the spatial and temporal distribution of sound energy and its di... Read More about Characterisation of the directionality of reflections in small room acoustics.

Objective quality measurement of audio using multiband dynamic range analysis (2009)
Presentation / Conference
Fenton, S., Fazenda, B., & Wakefield, J. (2009, November). Objective quality measurement of audio using multiband dynamic range analysis. Presented at Reproduced sound 25, Brighton

Ever since the very first recordings were made, people have strived to improve the recording and playback process to a point of ‘complete transparency’. However, in music production, it’s certainly the case that sound-engineers and producers employ t... Read More about Objective quality measurement of audio using multiband dynamic range analysis.

Studies in modal density – its effect at low frequencies (2009)
Presentation / Conference
Wankling, M., & Fazenda, B. (2009, November). Studies in modal density – its effect at low frequencies. Presented at Reproduced Sound 25, Brighton

The ability to objectively measure the reproduction quality of a small room at low frequencies has long been desired. Over many years, there have been attempts to produce recommendations, metrics, and criteria by which to define a particular room. Th... Read More about Studies in modal density – its effect at low frequencies.

DOA estimation in car for abnormal sound localisation (2009)
Presentation / Conference
Guan, L., Gu, F., Fazenda, B., Ball, A., Yichun, Y., & Pengxiao, T. (2009, August). DOA estimation in car for abnormal sound localisation. Presented at 8th International Conference on Damage Assessment of Structures, Beijing

Spurious noise in car cabinet can be not only annoying bust also indicative of some potential faults. A small square microphone array with 4 sensors was adopted in this paper to localize the sound source in car for fault diagnosis. A new voice activ... Read More about DOA estimation in car for abnormal sound localisation.

Noise source localisation in a car environment (2009)
Presentation / Conference
Fazenda, B., Gu, F., Ball, A., & Guan, L. (2009, August). Noise source localisation in a car environment. Presented at 8th International Conference on Damage Assessment of Structures, Beijing

Spurious noise (rattles, squeaks, etc) in the interior of car cabinets can be annoying, distractive and indicative of potential performance problems. Fault finding these problems can be difficult since the fault is intermittent and may not necessaril... Read More about Noise source localisation in a car environment.

Measurement and characterisation of faults in the intake system of a turbocharged engine using a directional acoustic probe (2009)
Presentation / Conference
probe. Presented at COMADEM 2009, San Sebastian, Spain

Engine intake system leaks are a primary reason behind unsatisfactory operational and emission characteristics of turbocharged engines. In faulty conditions, the intake mass flow sensed by the mass flow sensor does not reach the combustion chamber, r... Read More about Measurement and characterisation of faults in the intake system of a turbocharged engine using a directional acoustic probe.

Subjective validity of figures of merit for room aspect ratio design (2009)
Presentation / Conference
Wankling, M., & Fazenda, B. (2009, May). Subjective validity of figures of merit for room aspect ratio design. Presented at 126th Audio Engineering Society Convention, Munich

Attempts have long been made to classify a room's low frequency audio reproduction capability with regards to its aspect ratio. Common metrics used have relied on the homogeneous distribution of modal frequencies and from these a number of 'optimal'... Read More about Subjective validity of figures of merit for room aspect ratio design.

Can we predict what you hear? (2009)
Presentation / Conference
Wankling, M., & Fazenda, B. (2009, March). Can we predict what you hear?. Presented at University of Huddersfield Research Festival, Huddersfield

The optimization of modal spacing within small rooms (2008)
Presentation / Conference
Wankling, M., & Fazenda, B. (2008, November). The optimization of modal spacing within small rooms. Presented at Computing and Engineering Annual Researchers' Conference 2008, Huddersfield

The reproduction of audio in small rooms is significantly affected by room modes – resonant frequencies set up as a result of the geometry of the room. These frequency specific modes combine to form a unique frequency response for that room. This fre... Read More about The optimization of modal spacing within small rooms.

Acoustic diagnosis of driving belt physical condition in enclosures (2008)
Presentation / Conference
Fazenda, B., Gu, F., Ball, A., & Gilkes, O. (2008, October). Acoustic diagnosis of driving belt physical condition in enclosures. Presented at Internoise 2008, Shanghai, China

Timing belt transmission is a key subsystem of international combustion engines. Faults in such belt systems lead to power loss, increased emissions and, in case of failure, may even cause severe damage to the whole engine. Hitherto, the physical con... Read More about Acoustic diagnosis of driving belt physical condition in enclosures.

Optimal modal spacing and density for critical listening (2008)
Presentation / Conference
Fazenda, B., & Wankling, M. (2008, October). Optimal modal spacing and density for critical listening. Presented at 125th Audio Engineering Society Convention, San Francisco, CA, USA

This paper presents a study on the subjective effects of modal spacing and density. These are measures often used as indicators to define particular aspect ratios and source positions to avoid low frequency reproduction problems in rooms. These ind... Read More about Optimal modal spacing and density for critical listening.

3-Dimensional room impulse response measurements in critical listening spaces (2008)
Presentation / Conference
Romero Perez, J., & Fazenda, B. (2008, January). 3-Dimensional room impulse response measurements in critical listening spaces. Presented at Institute of Acoustics

Most of the knowledge and the existing objective acoustic measures defined to describe the sound field in large spaces are commonly evoked to predict the acoustic performance of small rooms. It is now becoming evident that this practice leads to flaw... Read More about 3-Dimensional room impulse response measurements in critical listening spaces.

Excess phase effects and modulation transfer function degradation in relation to loudspeakers and rooms intended for the quality control monitoring of music (2006)
Presentation / Conference
Holland, K., Newell, P., Castro, S., & Fazenda, B. (2006, January). Excess phase effects and modulation transfer function degradation in relation to loudspeakers and rooms intended for the quality control monitoring of music. Presented at Institute of Acoustics

Previous papers 1, 2 have discussed the effects of loudspeaker alignment and resonances on the accuracy of reproduction of low frequency audio signals, and a system of modulation transfer function (MTF) measurement was developed which incorporated bo... Read More about Excess phase effects and modulation transfer function degradation in relation to loudspeakers and rooms intended for the quality control monitoring of music.