Recent content by Notna

Thank you, all! From the discussion I understood the problem, it is that 'frequency' is used a bit too often without clear distinction. Thereby at times we come across an experimentally verifiable quantity and at others it is just a relic of the definition used.

Instantaneous frequency ω(t), is defined as the time derivative of phase. According to a paper by L.Madel, American Journal of Physics 42, 840 (1974); doi: 10.1119/1.1987876, this is significantly different from the frequencies in the Fourier Spectrum of the signal. However, there is no...