A Tesla-Blumlein PFL-Bipolar pulsed power generator, has been successfully designed, manufactured and demonstrated. The compact Tesla transformer that it employs has successfully charged capacitive loads to peak voltages up to 0.6 MV with an overall energy efficiency in excess of 90%. The Tesla driven Blumlein PFL generator is capable of producing a voltage impulse approaching 0.6 MV with a rise time close to 2 ns, generating a peak electrical power of up to 10 GW for 5 ns when connected to a 30 Ω resistive load. Potentially for medical application, a bipolar former has been designed and successfully implemented as an extension to the system and to enable the generation of a sinusoid-like voltage impulse with a peak-to-peak value reaching 650 kV and having a frequency bandwidth beyond 1 GHz. This thesis describes the application of various numerical techniques used to design a successful generator, such as filamentary modelling, electrostatic and transient (PSpice) circuit analysis, and Computer Simulation Technology (CST) simulation. All the major parameters of both the Tesla transformer, the Blumlein pulse forming line and the bipolar former were determined, enabling accurate modelling of the overall unit to be performed. The wide bandwidth and ultrafast embedded sensors used to monitor the dynamic characteristics of the overall system are also presented. Experimental results obtained during this major experimental programme are compared with theoretical predictions and the way ahead towards connecting to an antenna for medical application is considered.

This dissertation seeks to identify the purposive force that determines the form and function of commercial stereophony in capitalist society, and the ways in which this force affects the productive and consumptive activities of stereophonic practitioners and listening audiences. Employing dialectical materialism, I examine three social processes that either historically established or continue to influence the mediative potential of stereophonic sound: the invention and industrial standardization of the stereophonic apparatus, the professionalization of stereophonic practitioners, and the social construction of stereophonic listeners as a mass consuming audience. These interrelated studies reveal perceived economic necessity as the dominant causal force that governs all stereophonic processes and practices under the capitalist economic system. Informed by my chapter findings, which complicate Karl Marx’s materialist base and superstructure schema – a coarse conceptual abstraction of capitalist production, I construct a more refined and flexible schematic diagram that offers a distinctive bird’s eye view of the universal interplay between capitalists, producers and consumers. This novel conceptual schematic depicts productive forces and productive relations as coterminous expressions of the dual-purpose of capitalism: to produce surplus-value for accumulation by capitalists, and to do so in perpetuity.

This study investigates whether different stereo techniques used as a main array influences the preferred level from spot microphones when combined in a mix. Time delay compensation and its influence on spot microphone level was also examined. A clarinet soloist and a violin & piano duo were recorded as stimuli. A listening test was conducted where subjects were asked to set the level on spot microphone channels of a clarinet, and violin in combination with several stereo techniques. A/B, X/Y, ORTF, and Blumlein were examined. In general, results suggested that there wasn’t a significant difference in preferred spot microphone level between stereo techniques. Time delay compensation could not be proven to significantly influence the preferred spot microphone level.