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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Acoustic System Resonators posted by thetubeguy1954 on January 24, 2007 at 07:58:29:
Seems to me that IF they are excited by sound waves in the room, thus resonating, then they will add some kind of sound to the mix. The questions then become: 1) Is it loud enough to be heard over the primary, secondary etc. sounds being generated by the stereo? 2) What frequencies do they resonate over? 3) What is the duration of this resonance? 4) Why should it always be pleasing?Addressing question 1: Will exciting a small metal cup with fins be audible. This depends on the frequency and amplitude of the resonance. If it rings like a bell then it will have a high Q in a fairly narrow frequency band. This could be audible I suppose. If it is more like tapping a flat piece of metal then it will contribute no more or no less to the sound in the room than other metal objects in the room.
Addressing Question 2: Assuming it is audible then it likely has to have a relatively high Q and therefore resonates over a narrow frequency band (like a bell). The frequency will then depend on the size, thickness and metal type.
Addressing Question 3: The duration will also be dependent on the Q of the resonance. If it is a high Q it will ring for a long time and a short excitation will have repercussions for perhaps several seconds. A low Q will have a faster damping time and broader frequency applicability (but perhaps have serious impact on the audibiilty).
Addressing Question 4: Why should this be always pleasing? Perhaps we are not so sensitive to the exact frequency of overtones and harmonics but just whether they are present at all or not?? Lots of processes strip these harmonics away and it is a clear sign of listening to recorded vs. live music.
If this is the case, then a minute amount of barely audible upper harmonic information, even if it not the "right" harmonic information, could perhaps give a positive psychoacoustic impression. The slightly different content of those harmonics from the different metals slightly flavoring the result. Mind you this is not the same as adding noise up there because probably these little cups have quite narrow frequency bandwidths of radiation. It might be more like adding a good supertweeter, which also seems to open things up and even makes bass seem better.
Now, there are a lot of IFs there, any one of which could be false. I am merely stating all these things hypothetically in the sense that I can see conceiveably where they might do something. I am not stating I support them or that this should work. In fact, I have been to a demonstration of these cups and really couldn't reliably hear the difference when they were in place or not in place. IMO, there is less fantasy with these devices than with say the Intelligent Chip.
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Follow Ups
- Re: Acoustic System Resonators - morricab 09:03:43 01/24/07 (0)
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