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  • Ear001

    addikt

    válasz Lompos48 #37871 üzenetére

    Sound Practices 1993 Summer, olvasói levél:

    ... the same as we have found, that AC signals are electromagnetic "shockwaves". I think that there is more to that most audio enginers realize. To give you an example, when I started looking at capacitors in 1979, we devised the following test:

    Connect a capacitor over the output terminals of a stable power amplifier, then connect a frequency generator to the input, and set the volume level at about 1/4 to 1/2 volume. Then run a frequency sweep from 0-20kHz into the amplifier. All the plastic capacitors that I've tried sounded like a small (very small) loudspeakers, the paper caps were almost silent. We employed sensitive listening devices like medical stethoscopes for these tests. The frequency at which a capacitors resonates under these conditions closely matches the colouration it introduces into the sound of the amplifier when used in the signal path. ...

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