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Meaning of negative frequency of sound wave
https://physics.stackexchange.com/questions/45660/meaning-of-negative-frequency-of-sound-wave#:~:text=To%20summarize%2C%20the%20negative%20frequency%20just%20means%20that,for%20contributing%20an%20answer%20to%20Physics%20Stack%20Exchange%21
Meaning of negative frequency of sound wave
https://physics.stackexchange.com/questions/45660/meaning-of-negative-frequency-of-sound-wave
To summarize, the negative frequency just means that the sounds emitted at that time are heard "backwards" at a later time--"reflected" at the point in time when Bob crosses Alice. BONUS: http://what-if.xkcd.com/37/
Positive and Negative Frequencies - Stanford University
https://ccrma.stanford.edu/~jos/mdft/Positive_Negative_Frequencies.html
Positive and Negative Frequencies In § 2.9, we used Euler's Identity to show Setting , we see that both sine and cosine (and hence all real sinusoids) consist of a sum of equal and opposite circular motion. Phrased differently, every real sinusoid consists of an equal contribution of positive and negative frequency components.
Is it possible for sound frequency to be negative? - Quora
https://www.quora.com/Is-it-possible-for-sound-frequency-to-be-negative
Originally Answered: Can frequency of sound theoretically be negative? Yes and no. For a sound wave in isolation, or as the ear reacts to it, no: there’s no audible difference between A cos ( ω t ) and A cos ( − ω t ) (where the angular frequency ω = 2 π f saves writing a lot of pi’s).
Negative feedback in audio amplifiers: Why there is no ...
https://www.edn.com/negative-feedback-in-audio-amplifiers-why-there-is-no-such-thing-as-too-much/
The siren song of negative feedback is that maximising A makes the ETF approach zero and makes the STF approach -1/B (s). The quantity A (s) • B (s) is called “loop gain.” This is the more precise term for what we loosely call “the amount of negative feedback.”
k-space: negative frequencies - Questions and Answers in MRI
https://mriquestions.com/negative-frequencies.html
The use of negative frequencies to describe common physical phenomena like sound waves is generally unnecessary. For example, it is perfectly adequate to say that "middle C" has a frequency of 261.63 Hz or that the voltage from an electrical outlet alternates at 60 Hz.
"Negative" frequencies? : musictheory
https://www.reddit.com/r/musictheory/comments/16i9p0/negative_frequencies/
"negative frequency" on its own doesn't mean anything, because something can't complete a cycle, for example, "-100 times in one second". it sounds like by negative frequency this means phase-inverted frequencies. so yes, inverting a waveform in audacity should give you the same effect as a "negative frequency", that is cancelling it out to make …
Meaning of negative values in audio waveforms - Stack …
https://stackoverflow.com/questions/1380692/meaning-of-negative-values-in-audio-waveforms
The sample values in a sound file can be thought of as the movement of the microphone membrane used to record that sound: the microphone membrane vibrated up (positive) and below (negative) its rest position (zero). Similarly, to reproduce this sound, the speaker membrane will move ahead (positive) and back (negative) from its rest position (zero).
frequency - What is the physical significance of negative ...
https://dsp.stackexchange.com/questions/431/what-is-the-physical-significance-of-negative-frequencies
Negative frequencies are used all the time when doing signal or system analysis. The fundamental reason for this being the Euler formula e j ω n = cos ( ω n) + j sin ( ω n) and the fact that complex exponentials are eigenfunctions of LTI systems.
Understanding Audio data, Fourier Transform, FFT and ...
https://towardsdatascience.com/understanding-audio-data-fourier-transform-fft-spectrogram-and-speech-recognition-a4072d228520
An audio signal is a complex signal composed of multiple ‘single-frequency sound waves’ which travel together as a disturbance (pressure-change) in the medium. When sound is recorded we only capture the resultant amplitudes of those multiple waves.
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