Sökning: "audio frequency"
Visar resultat 11 - 15 av 46 avhandlingar innehållade orden audio frequency.
11. Audio spectrum analysis of umbilical artery Doppler ultrasound signals
Sammanfattning : The aim of this thesis was to develop an objective method for evaluation of umbilical artery circulation based on auditory perception of the Doppler sound signals. Study I. The operator listened to synthetically produced sound signals from continuous flow. LÄS MER
12. Low-Complexity Signal Processing for Speech Enhancement and Audio Analysis
Sammanfattning : In real-time signal processing there is a constraint to finish processing of an audio signal before the next audio segment is received. This makes it important to have signal processing algorithms with low computational complexity while still maintaining high quality results. LÄS MER
13. On low-complexity frequency selective digital filters and filter banks
Sammanfattning : En filterbank består av flera filter som arbetar tillsammans för att dela upp en signal i olika frekvensband. De kan också användas för att slå ihop signaler separerade i frekvensplanet till en enda. Sedan tidigt 70-tal har man lärt sig att designa förlustfria filterbankar som alltså inte introducerar några som helst fel i systemet. LÄS MER
14. Sparse Modeling of Grouped Line Spectra
Sammanfattning : This licentiate thesis focuses on clustered parametric models for estimation of line spectra, when the spectral content of a signal source is assumed to exhibit some form of grouping. Different from previous parametric approaches, which generally require explicit knowledge of the model orders, this thesis exploits sparse modeling, where the orders are implicitly chosen. LÄS MER
15. Design and Analysis of Highly Linear Integrated Wideband Amplifiers
Sammanfattning : This dissertation deals with techniques for designing integrated amplifiers with high linearity. Amplifiers with operating frequencies from Audio to RF have been built. An enhanced feedback configuration, capable of very low distortion, is presented. LÄS MER