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In Reply to: RE: Ahhh... posted by kootenay on December 24, 2020 at 10:39:05
Allow me to restate my point a little more clearly. How can vibration affect a process which is magnetic in nature? I.e., does vibration wiggle the magnetic lines of flux? I can certainly appreciate that anti resonance and seismic isolation is good for components in general, it's the cassette case itself that is a mystery. Why try to stop the case from resonating when the tape head itself is also resonating?
Follow Ups:
It's been proven that the magnetic field shifts if there's a presence of mechanical vibration which means it will create a slight intermittent non-contact on the tape heads, thus resulting in distortion and other sound anomalies. You won't be able to eliminate it completely but you can certainly mitigate its effect by designing better head transport thus increasing its smooth and constant contact operation on the tape heads.
If a thing's worth doing, it's worth doing well
(Proverb)
Edits: 12/24/20
Vibration doesnt effect the magnetic properties on the cassette tape. What vibration can do is wiggle the tape while its running across the record or playback heads causing uneven recording or playback.
so, it's mechanical damping of WRMS! who knew? that all the tape heads here seem to have forgotten? that measurement was a pretty big deal from the manufacturers, but wtf do they know!
that's a phenomena in and of itself isn't it?
damn I'm cranky ... Merry Christmas 3db! ... please continue to reject BS
best regards,
N.t.
why yes, thank you! I'm glad Christmas is over since it was the worst one ever!
how was yours?
with regards,
It was a good Christmas considering my wife passed away in October. My family and I pitched in and made it memorable. Glad to hear your feeling better.
I remember you posting that last month before Thanksgiving ... the holidays just have to be tough for you ... I am so sorry, though it's good to hear that you have family and support to help you get through this period of grief ... hang in there brother!
best regards & wishes
It's been proven? Do you have a link?
However, it has nothing got to do with the tape heads and cassette tape magnetic fields subject matter that we just talked about. Sorry for the confusion.
Click below for the link of Magnetic Field Shift due to Mechanical Vibration...
If a thing's worth doing, it's worth doing well
(Proverb)
It's very similar to the issue with cable and wire that carry the "audio signal" anywhere in the system. The cable and wire are affected by external vibration that affects the sound quality you eventually hear coming out of the speakers.Pop quiz: what is the "audio signal" in cables and wires? And what does vibration do to the "audio signal?"
Edits: 12/25/20 12/25/20
Sound is basically vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid, or solid.
If it is about the transmission of sound waves (vibrations) through metallic wires, then we have to keep in mind that sound propagates through variation in pressure of the medium. Vibrations get propagated from one end of the medium to the other through successive vibrations of molecules of the medium.
If a thing's worth doing, it's worth doing well
(Proverb)
The sound is transmitted through the air once the acoustic waves leave the speakers. That part is obvious. What's not obvious is what the "audio signal" is in wires and cables. Hint: it's not vibration. The same idea applies to the cassette and tape head - it's not an acoustic wave until it leaves the speakers or headphones. Before that the audio signal is a different animal. But what? An (alternating) voltage, an (alternating) current, an audio waveform? An electromagnetic wave?
Edits: 12/25/20
The audio signal when it leaves from a source through a cable is basically electric signals that have different frequencies which are placed within a magnetic field. The sound that we hear from the speaker is caused by vibrating the coil, which in turn vibrates the membrane of the driver and thus producing the exact replica of the frequencies which is captured in the first moment. Music to our ears.
If a thing's worth doing, it's worth doing well
(Proverb)
You're close, very close. The "signal" in the speaker cable is an alternating current and voltage that causes the speaker diaphragm to move back and forth. When current goes through a voice coil it produces a magnetic field that moves the diaphragm one direction or the other depending on which direction the current is moving through the + and - connections at that instant.. The instantaneous rate of alternating current is approximately 20 Hz to 20,000 Hz. The "signal" in the cable doesn't contain frequencies. The instantaneous frequency of the acoustic signal/waveform coming out of the speakers is derived from the rate that current and voltage in the cable is alternating at that instant.
For the eloquent and precise info. Stay safe.
If a thing's worth doing, it's worth doing well
(Proverb)
Edits: 12/26/20
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