A New Method of Digital Sound Reconstruction
* Präsentierender Autor
Zusammenfassung:Classical Digital Sound Reconstruction (DSR) has been shown to be able to reproduce audio signals with the help of superimposed sound pulses. Still, this method has never been proven to be useful considering commercial applications. We start with the underlying idea of DSR and propose a new method – Advanced Digital Sound Reconstruction (ADSR) – which paves the way for a sound generation principle most effective in the lower frequency range. Using a redirection mechanism as an addition to classical DSR it is possible to achieve a completely flat frequency response regarding the sound pressure in a channel. This redirection unit uses shutter gates in order to separate positive and negative sound pulses letting only those pass, which contribute positively to the desired reconstruction of the audio signal. Compared to the well-known linear scaling of the sound pressure with the frequency, this concept offers exceptional performance for the low- to mid-frequency range – in the region where classical excitation schemes tend to struggle. Starting with the basic concept a concise framework of this method will be presented. This includes analytical investigations as well as numerical and experimental verification.