Authors: Máté Csanád, Amira K. F. Val Baker, Paul Oomen.

Abstract: In this paper, we utilise optimization methods to determine a frequency-independent phase shift such that two phase-shifted versions of a signal can be summed and the resulting amplitude spectrum is unchanged. A phase difference between two signals is thus defined, which remains constant for all frequencies within a given range. For the intended purpose of this study, we set the frequency range to the audible human hearing range of 16 Hz–20 kHz. We found that a new 3-stage filter method provides a variable phase shifter (i.e., ϕ = 0–360°) without the need for additional amplifiers. In addition, we present a new method that reduces the number of filters necessary, improving both the accuracy and efficiency of current techniques.

Disciplines: Engineering, Signal Processing, Electrical and Computer Engineering, Physics, Physical Sciences and Mathematics, Statistical, Nonlinear and Soft Matter Physics.

Keywords: band filter, signal processing, sound transformation, phase shifter, time delayer, frequency independence.

Citations:

APA: Csanád, M., Val Baker, A.K.F., & Oomen, P. (2024). A Frequency-Independent Phase Shifter. Acoustics, 6, 713-729. https://doi.org/10.3390/acoustics6030039

AMA: Csanád M, Val Baker AKF, Oomen P. A Frequency-Independent Phase Shifter. Acoustics. 2024; 6(3):713-729. https://doi.org/10.3390/acoustics6030039

Chicago: Csanád, Máté, Amira K. F. Val Baker, and Paul Oomen. 2024. "A Frequency-Independent Phase Shifter" Acoustics 6, no. 3: 713-729. https://doi.org/10.3390/acoustics6030039

IEEE: [1] M. Csanád, A. Val Baker and P. Oomen, “A Frequency Independent Phase Shifter”, Acoustics 6, no. 3: 713-729, 2024. https://doi.org/10.3390/acoustics6030039

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