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The Frequency Shifting Hearing Aid : 6 Steps (with ...
https://www.instructables.com/Intro-High-Frequency-Hearing-Loss-and-the-Frequenc/
Here is a high level view of how the circuit works, in a helpful block diagram. First, the bandpass filter isolates the high-frequency information we want to shift - specifically, the 3 kHz to 5 kHz band. Second, the modulator shifts - with a 2 kHz carrier wave - …
Sound shifter circuit - Electronic Circuits and Diagrams ...
https://www.circuitstoday.com/sound-shifter-circuit
the ic ht8905 is a single chip cmos sound modulator ic which produces seven steps of shift in the frequency of the given sound.this producing a dramatic change in the output.the ic produces two effects robotic and vibrato.the two effects can be selected using push buttons.an audio amplifier ic ht82v 733 is also included in the circuit to amplify …
Frequency Shifter - SoundBridge
https://soundbridge.io/frequency-shifter/
Frequency Shifter is a device which raises or lowers the frequency of an input signal. It does this using a complex amplitude modulation like technique. Unlike the pitch shifter, the frequency shifter does not preserve the harmonic relationships between the various tones and harmonics in the input signal.
Chapter 13. Frequency and Pitch Shifting
https://www.cim.mcgill.ca/~clark/nordmodularbook/nm_spectrum_shift.html
A nice description of how this circuit works is given in the article "An Efficient, Precise Frequency Shifter", by Jens Groh, in the CSound Magazine, summer 2000 issue. Unlike the spectrum shifting method described earlier, this approach does not need any phase shifting filters, but it needs four ringmodulators instead of two, and two ...
sound - How to shift frequency of whole audio file ...
https://sound.stackexchange.com/questions/34921/how-to-shift-frequency-of-whole-audio-file
For audio purposes, it is quite reminiscent of the typical ring-modulation character (which isn't entirely surprising, since it is implemented with multipliers). At any rate, if you frequency-shift, say, human voice, up a few Hz, it'll sound nothing like the same voice speaking/singing a tone higher, because the harmonics don't match anymore.
HiFi Audio Circuit Design - Texas Instruments
https://www.ti.com/lit/pdf/sboa237
Because the frequency of audio signal is lower than 20 kHz, 100-dB isolation between left and right channel is high enough and can easily be achieved by proper PCB layout and power supply decoupling. 2.7 High Stereo Balance The sound field will shift to the larger volume if the volume of the left and right channels is not same. This
Ryan Williams - Frequency Shifter
http://www.sdiy.org/destrukto/freq_shifter.html
This project is a single channel frequency shifter inspired by Jürgen Haible's design(1 and 2). This circuit is basically a single sideband modulator that operates in the audio range. It will allow up and down shift at the same time with the ability to shift into negative frequencies. The
comp.dsp | Basics of Frequency Shifting
https://www.dsprelated.com/showthread/comp.dsp/105060-1.php
>>I have an audio frequency input tone consisting of a single relatively >>stable signal that is in the range of 5 kHz +/- 5 Hz. I want the circuit > to >>shift the tone to precisely 5 kHz. > > If you have no other signal than this tone, you can find its amplitude as > a function of time, and multiply (mix) that by a "pure sine".
Frequency Independent Phase Shifter - Circuit Cellar
https://circuitcellar.com/research-design-hub/frequency-independent-phase-shifter/
This article presents the implementation of a frequency independent phase shifter using basic building blocks of analog circuits, such as op amps, JFETs and passive devices. As mentioned earlier, traditional phase shifters are designed using an all pass filter, with a phase shift varying from 0 degrees to 180 degrees for a given frequency.
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