- travelpaLv 79 years agoFavorite Answer
This case study is aimed at finding the effect of adjustment of phase-shift circuit on audio output.
By adopting an assembly consisting of two sets of amplifier with a set of inverter and a set of power amplifier, a microphone was first receiving the signal and then enlarged its waveform through a set of preamplifier and reversed its waveform by a set of phase inverter. Since there was phase shift cuarsed by the inverter therefore, an additional set of phase adujster was used for adjusting the magnitude of phase shifting. Subsequently, the circuit was amplified by a set of power amplifier and then create output through the speaker.One of the outcomes was expected that the original sound would be mutually offset due to phase inversion of 180 degree. However, the results were not as expected. This experiment shows that after the waveform being inverted and adjusted there was not any change in sound which can be recognized by human ear.
2011-12-24 21:10:40 補充：
The effect of A on B.
( 豆腐腦的英文是 . . . ? ㄏㄏㄏ~~~ )
2011-12-25 07:55:33 補充：
2011-12-25 08:26:54 補充：
a microphone was first receiving . . . its waveform by a set of phase inverter.
the signal was first received through a micrphone and enlarged its waveform by a set of preamplifier and then the waveform was reversed with a set of phase inverter.
- 9 years ago
This special goal discusses the adjustment phase displacement electric circuit, to sound output influence.
Adds on an end product using two groups of amplifiers which group of reversers as well as a group of power amplifier compose.
From the very beginning passes through group of pre-amplifiers after the microphone receive signal to enlarge its profile to use a phase reverser to make a profile opposition again the movement to meet this because the phase reverser can have the displacement production therefore behind adds on a group of phase shifter to adjust the phase shifting again the size, after finally uses a group of power amplifier to enlarge the electric circuit again to make the output by the loudspeaker.
In which expected the achievement is reverse can offset the originally sound mutually after the phase 180 degrees, but the result and is inferior anticipated, what finally presents is the profile and does not have any change after the reverse adjustment is the human ear can recognize.