17,735 research outputs found
The Music of STEPHEN PAULUS, AULIS SALLINEN, GUNTHER SCHULLER, ELLIOTT CARTER, LUCIANO BERIO, and JOHN CAGE Thursday, November 19, 1992 8:00 p.m. Stude Concert Hall
No full textPresented by SyzygyProgram: Air on Seurat (The Grand Canal) / Stephen Paulus -- From a swan song / Aulis Sallinen -- Quartet for double basses / Gunther Schuller -- Scrivo in vento / Elliott Carter -- Sequenza / Luciano Berio -- Amores / John Cage
Service-oriented models for audiovisual content storage
No full textWhat are the important topics to understand if involved with storage services to hold digital audiovisual content? This report takes a look at how content is created and moves into and out of storage; the storage service value networks and architectures found now and expected in the future; what sort of data transfer is expected to and from an audiovisual archive; what transfer protocols to use; and a summary of security and interface issues
Dataset for: Active Control of the Sound Power Scattered by a Locally-Reacting Sphere - Supporting Data
No full textData required to support results presented in Elliott, S.J., Orita, M. and Cheer, J.,(2020). Active Control of the Sound Power Scattered by a Locally-Reacting Sphere, Journal of the Acoustical Society of America. DOI: https://doi.org/10.1121/10.0000843</span
Prediction of mechanical effect due to a cochlear implant
No full textThe effect of a cochlear implant on residual, low frequency, hearing is complex and poorly understood. This research focuses on the mechanical effect of a cochlear implant on the cochlear mechanics by comparing the predicted basilar membrane, BM, response before and after the implantation. Audiograms measured from pre- and post-implant users are used as input of a computational model of the passive cochlea, proposed by Elliott et al. (Elliott et al., 2011), which are then used to study the mechanical effect of the implantation. In the model, a short cochlea implant, designed to electrically stimulate the basal regions at high frequencies while allowing normal hearing at low frequencies (Cochlear, 2008), is introduced into the lower cochlear fluid chamber. The active amplification of the cochlea is not considered, since a passive cochlear model whose response is not dependent on stimulus level can reasonably well represent the cochlea for subjects with hearing impairment. The results for the BM coupled response show that the volume change in the fluid chambers due to the implant has a negligible effect, less than about 0.1 dB, on the vibration of the modeled cochlea at low frequencies. A more extreme condition, in which the cochlear implant is assumed to touch the BM at some or whole basal positions and thus impeded its motion, is also studied. Although no travelling wave can propagate in the basal region in the latter case, the remainder of the cochlea is still coupled to the stapes by incompressible fluid. The BM response at low frequencies is relatively unaffected by the blocking of the BM motion in the basal region, although the effect is more dramatic for excitation frequency whose characteristic place is close to the end of the implant. Although this work does not model every aspect of the cochlear implantation, it does provide a way of predicting the possible mechanical effects of the implantation on the cochlear passive mechanics and the residual hearing
Austin Papers: Series II, Part II, 1818-1847
No full textCopy of transcript for a letter from E. A. Elliott reporting Stephen F. Austin's appointment as judge to the First Circuit Court of Arkansas Territory and encouraging the recipient to return to Arkansas to manage his business interests
Letter from J. D. Elliott to Alden Partridge, 21 May 1824
No full textThe writer (tentatively identified as Jesse Duncan Elliott) sends his nephew, Stephen D. Elliott, to the Academy.Transcription by Joseph Byrne. Transcriptions may be subject to error
Car cabin personal audio: acoustic contrast with limited sound differences
No full textThe generation of independent or personal listening zones is of significant interest in the car cabin environment. As such there are a number of methods of optimizing loudspeaker arrays to achieve personal audio reproduction. The optimization methods currently in the literature generally have a trade-off between the level of acoustic contrast between the bright and dark zones and the variance of the sound pressure within the bright zone. A high level of variance in the bright zone may produce a subjectively poor performance and although this may be overcome using the least squares or acoustic contrast with planarity control methods, they are generally non-trivial to setup to achieve both a high level of acoustic contrast and a low level of variance. This paper proposes a new optimization method which maximizes the acoustic contrast with a constraint that limits the sound differences within the bright zone and is relatively straightforward to setup. The performance of the proposed optimization method is compared to acoustic contrast maximization, least squares and acoustic contrast maximization with planarity control methods through a series of simulations of a car cabin personal audio system
Optimisation of a velocity feedback controller to minimise kinetic energy and maximise power dissipation
No full textIn this study the active vibration control of a structure modelled as a single degree of freedom system and excited by a white noise force is considered. The control system consists of an inertial actuator driven with a signal proportional to the velocity of the structure under control measured by an ideal collocated sensor. The optimisation of the physical and control parameters of the control system such as the internal damping of the actuator, its natural frequency and the feedback gain of the controller are considered such that either the kinetic energy of the host structure is minimised or the power dissipated by the control system is maximised. This type of control system is only conditionally stable therefore a stability condition has to be satisfied by the optimisation process. The paper shows that the two optimisation criteria are equivalent.<br/
Austin Papers: Series III, Miscellaneous Material, 1814-1821
No full textCopy of transcript for a letter from Elias Austin Elliott, on July 28, 1820, relating Stephen F. Austin's appointment as a judge of the first circuit, the health of several men he knows, and the refusal of a man to deliver salt
- …
