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...

Currently, achieving high-fidelity sound spatialization requires the prospective user to undergo lengthy measurements in an anechoic chamber using highly specialized equipment. This, in turn, has increased the cost and reduced the availability of high-fidelity spatialization to the general public. An attempt to generalize 3D audio has been made using the measurement of a KEMAR dummy head or cre...

According to WHO, at any one time, around 50 per cent of medical equipment in lowand middle-income countries cannot be used because of lack of maintenance or spare parts.1 We have found that unwillingness or inability to repair equipment and put it back in use is also a major cause. New equipment is made available by different international non-government organisations (INGOs) competing with on...

A contemporary PC user, typically expects a sound card to be a piece of hardware, that: can be manipulated by ’audio’ software (most typically exemplified by ’media players’); and allows interfacing of the PC to audio reproduction and/or recording equipment. As such, a ’sound card’ can be considered to be a system, that encompasses design decisions on both hardware and software levels that also...

The Natural Speech Technology (NST) project is the UK’s flagship research programme for speech recognition research in natural environments. NST is a collaboration between Edinburgh, Cambridge and Sheffield Universities; public sector institutions the BBC, NHS and GCHQ; and companies including Nuance, EADS, Cisco and Toshiba. In contrast to assumptions made by most current commercial speech rec...

this paper presents a new audio encryption algorithm based on permutation and residue number system. in the current approach, signal samples are combined with residue number system through permutation; therefore, a specific noise is generated. then, the audio signal is combined with the noise, generated by the algorithm, to produce a silence signal. for this purpose, the algorithm uses a predef...

introduction: quantitative and qualitative enhancement of educational activities is an essential issue. learners’ cooperation in the teaching process in order to increase teaching effectiveness and promotion is considered significant. the aim of the present study was to determine the effect of establishment of student working group on the teaching general embryology course to medical students. ...

The objective of the MEMO project is to design, integrate and operate applications which utilise interactive mobile Multimedia services by integrating two subsystems: a high-speed broadcasting system, and a low speed bi-directional communications system. This is realised by combining the existing GSM mobile telecommunications network and the Digital Audio Broadcasting system. After a first succ...