Quote:
Originally Posted by drarthurwells
If there is no source to the ringing but the driver itself, then the ringing represents a complete loss of driver control and thus a loss of transient reponse. Must be driver resonance. At this point of resonance there is a loss of driver control and thus a loss of transient response - but it could occur at an isolated frequency in a driver that otherwise had excellent transient reponse. So ringing would have no relation to the general transient response of a driver cone. Metal tweeters sometimes ring at certain frequencies but otherwise can have great transient response.
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From the information I've gathered so far:
Diaphragm: the moving object that vibrates the air causing sound waves.
Ringing: sounds (signals) emitted by a diaphragm that are not part of the original input signal.
Ringing at a specific (isolated) frequency: sound (signals) at a specific frequency emitted by a diaphragm that are not part of the original input signal.
Driver: (1) the assembly comprised of the permanent magnet + coil. (2) the assembly comprised
of the permanent magnet + coil + diaphragm.
Driver enclosure resonance: spurious sounds emitted by the driver enclosure that are caused by sound waves bouncing off the enclosure and making it sympathetically vibrate.
Diaphragm material resonance: spurious sounds emitted by the diaphragm caused by the sympathetic vibrations within the diaphragm material itself.
http://en.wikipedia.org/wiki/Sympathetic_vibration
Sources of ringing: (1) imperfect control of driver movement by amplifier (wrong amount of damping or current), (2) imperfect control of diaphragm movement by amplifier + driver (permanent magnet/coil assembly), (3) inertia of diaphragm mass, (4) tendency of the diaphragm material itself to resonate, (5) feedback from the resonance of the driver enclosure, and (6) aerodynamic drag.
Electromagnetic induction:
http://en.wikipedia.org/wiki/Electromagnetic_induction
http://en.wikipedia.org/wiki/Inductor
http://en.wikipedia.org/wiki/Induction_motor
Driver controlled by: (1) amplifier with high (sufficient) current, high (sufficient) slew rate, and sufficient damping (not too much or too little) (2) amount of induction.
Aerodynamic drag:
http://en.wikipedia.org/wiki/Drag
Transient response: (1) how quickly the diaphragm responds to the orignal input signal and COMES TO REST after the original signal stops; (2) how quickly a diaphragm can change POSITION (accelerate/decelerate from point to point); (3) how quickly the diaphragm responds to the original signal
and comes to rest after the original signal stops at a SPECIFIC FREQUENCY; (4) how quickly a DRIVER (the permanent magnet + coil assembly) can respond to a signal as it relates to induction; (5) the amount of driver "control" over the diaphragm; (6) a time measurement which tracks the movement of a diaphragm to a signal start/stop at a specific frequency and has by definition zero "driver" caused ringing; and (?) ...there are probably even more definitions of "transient response" out there!
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General transient response: ???? perhaps the average of the transient responses for all the frequencies
measured?
Relation of ringing to "general transient response": ???? perhaps "general transient response" +
the additional time caused by the average time of ringing at each frequency.
Great/excellent transient response: ???? perhaps a general transient response that is close to the fastest available general transient response.
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