In this paper an extended robust independent components analysis algorithm based on cumulants is applied to identify vibrational alarm signals generated by soldier termites in southern Spain (reticulitermes grassei), measured using low cost equipment. A seismic accelerometer is employed to strongly characterize these acoustic emissions. To support the proposed technique, vibrational signals fro...

Introduction Noise pollution has become an important problem in our society. Noise assessment regulations require the measurement and evaluation of noise. The basic equipment for this measurement is the noise monitoring systems (or NMS). The current generation of NMS consists of "dumb" systems that record noise level and, possibly, noise spectra, over programmed periods of time. The interpretat...

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Acoustic rain gauges have long been espoused as a possible means of monitoring wind and rainfall in regions far from land-based measurements. The rapid provision of data from such systems could contribute to weather forecasting. This paper provides an overview of a recent equipment trial off Galway, during which wind speeds in excess of 30m s -1 were encountered. The deployment also tested the ...

Following an extensive survey of choral practitioners which gathered evidence of pitch drift in a cappella choral singing, a series of experiments has been undertaken with amateur choirs around the United Kingdom. For each choir, data was collected over twenty rehearsals by a member of the choir using equipment supplied by the Open University. The data collected includes recordings of a special...

Interventional neuroradiology, sometimes requiring full anesthesia, is now performed in high-risk patients. The neurologic state of an anesthetized patient cannot always be sufficiently evaluated during the neuroradiologic examination. In such cases neurophysiological methods provide information about some aspects of the patient's cerebral condition. Three useful neurophysiological methods for ...

In this paper a new technique for coding speech signals for the use in high quality text-to-speech environment is presented. A prosodic control of the acoustic output is implemented merely by modifying the speech waveform during the resynthesis phase. Any degradation in sound quality is avoided, since no parametric representation of the speech signal is used for the storage of speech. This algo...

Abstract Suspended sediment in seawater not only affects the optical properties of seawater, such as transparency and color, but it also greatly process underwater acoustic propagation. The detection equipment is affected by change suspended concentration (SSC) use. To address this problem, paper deeply investigates correlation between characteristic parameters propagation SSC different types w...

We present an audio-visual Virtual Reality display system for simulated sound fields. In addition to the room acoustic simulation by means of phonon tracing and finite element method this system includes the stereoscopic visualization of simulation results using a 3D back projection system as well as auralization by use of a professional sound equipment. For auralization purposes we develop a s...