If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#271
|
|||
|
|||
The disappearance of darkness
On 2013-05-22 20:23:39 -0700, Eric Stevens said:
On Wed, 22 May 2013 18:34:32 -0400, nospam wrote: In article , Eric Stevens wrote: They don't listen to electricity. of course they do. electricity is what moves the speaker coil. No what moves the coils is the effect of magnatism that does that. because there's electricity flowing in a coil. I'd call it current but each to his own. technically it's current, but it doesn't change anything. It changes the magnetic field of the coil. that's the whole point, and calling it electricity or current doesn't change that. if it wasn't for electricity, there would be no sound. if it weren't for the cone compressing the air etc.. they'd be no sound. because electricity is causing it to move. No, magnatism is doing that 'electricity' runs through many wire's in cables and they don't all make sounds. so what? Electricity doesn't make sound. (Can you plug wires into your head and listen to music?) shut off the electricity to your house and let us know how much sound you get from your sound system. if there was no electricity there would be no sound. period. Ditto for speakers, not to mention several other devices. ....and there you are wondering how to charge the battery for your DSLR, while that 40 year old SLR, or rangefinder keeps on snapping away. -- Regards, Savageduck |
#272
|
|||
|
|||
The disappearance of darkness
On Wed, 22 May 2013 18:34:31 -0400, nospam
wrote: In article , Eric Stevens wrote: They don't listen to electricity. of course they do. electricity is what moves the speaker coil. No what moves the coils is the effect of magnatism that does that. because there's electricity flowing in a coil. There has to be a magnetic field other than the coil's. if it wasn't for electricity, there would be no sound. if it weren't for the cone compressing the air etc.. they'd be no sound. because electricity is causing it to move. Only because of the magnetism. so what? if there was no electricity, it would not move. If there was no air gap it wouldn't move even then. -- Regards, Eric Stevens |
#273
|
|||
|
|||
The disappearance of darkness
On Wed, 22 May 2013 17:46:09 -0400, Alan Browne
wrote: On 2013.05.21 22:27 , Eric Stevens wrote: They don't listen to electricity. They listen to sales pitches that appeal to their gear-headedness (ah! something like some photographers) and desire to have nifty things. The whole audio magazine industry is geared around deluding Audi O'Phile while advertising useless junk for him to buy. There is no doubt about that. Nevertheless, some junk is worth buying. -- Regards, Eric Stevens |
#274
|
|||
|
|||
The disappearance of darkness
On Wed, 22 May 2013 17:45:24 -0400, Alan Browne
wrote: On 2013.05.21 20:10 , Eric Stevens wrote: It's well known among some sections of the audiophile community that the ear is much more sensitive than any instrument. People who believe their ears have more dynamic range, phase sensitivity and frequency discrimination than instruments have a really bad name for themselves: audiophiles. To a point they are right. Nobody has yet reduced the functioning of the ear to simple mechanics. -- Regards, Eric Stevens |
#276
|
|||
|
|||
The disappearance of darkness
On Wed, 22 May 2013 17:44:21 -0400, Alan Browne
wrote: On 2013.05.20 19:47 , Eric Stevens wrote: On Mon, 20 May 2013 12:03:55 -0400, Alan Browne wrote: The only characteristic that has ever counted in speaker wire is low resistance for the installation. For such an amp, and such impedance at the speaker, no more than a 5% x impedance resistance between the amp and the loudspeaker and of course the ability to carry peak current. Since wire is relatively cheap compared to the system components it is quite easy and proper to simply over spec the cable gauge. While I generally agree with you I know from experience that use of some of the fancy cables on the market can result in both measurable and audible effects. I suspect the behaviour of the loud speaker has a lot to do with it. And as previously mentioned, any "measurable and audible effect" is probably to the bad, not the good. There is little doubt. -- Regards, Eric Stevens |
#277
|
|||
|
|||
The disappearance of darkness
Whisky-dave wrote:
On Friday, May 17, 2013 8:03:18 PM UTC+1, nospam wrote: In article , Whisky-dave wrote: You don't grasp the problem. Impedence is not resistance. A speaker with 8 ohm impedence might have 0.8 ohm resistance. http://www.prestonelectronics.com/audio/Impedance.htm a very non-technical article that doesn't say much beyond what happens if you connect speakers in parallel. Generally, the reading given by an ohmmeter will be about 2/3 to 3/4 of the impedance of the speaker. except when it doesn't. When you find it does it usually meaning you're not using the meter corectly, is there no link where you can prove 8R speaker coils drop to 0.8R resistance ? What matters to an amplifier supplying AC waveforms is impedance, not resistance. Some electrostatic loudspeakers as an extreme example have extremely high resistance and at certain frequencies very awkwardly low impedance. -- Chris Malcolm |
#278
|
|||
|
|||
The disappearance of darkness
nospam wrote:
In article , Eric Stevens wrote: but if you insist: € EEG monitoring of their brain activity showed statistically significant enhancement in alpha-wave activity how does this equate to a difference that can be heard? oh yea, it doesn't. it's *assumed* that if something shows up on an eeg, it must be audible. there is no evidence to back up this assumption. The EEG activity is not evidence that it is being detected? Of course it is, even if you don't know how. it's not evidence that it can be heard. just because there's brain activity doesn't mean it's audible. touch or smell, for instance, will cause a change in brain activity, but you can't hear either one. the question is can you hear ultrasonic sounds and the answer is definitely no. True. But sometimes what some people are hearing is a kind of distortion that is not being measured which by an accident of technology happens in the experiment to be being produced at the same time as the inaudible ultrasonic sound. Then you will see human ears and brains noticing a difference between two sounds when the only measured difference is an extra ultrasonic component. This leads unimaginative technologically educated pedants to conclude that the claims to be hearing a difference are pure imagination since the only measured difference is an inaudible ultrasonic component. It also leads to all sorts of wild speculative theories about how the inaudible might somehow be affecting the audible without showing a measurable audible difference. The unglamorous truth in such cases is often just that what is being heard is perfectly audible but wasn't being measured. Measurement technologists often assume that what they're measuring is everything that could possibly matter. If you check back on the history of the development of measurements of audible distortion you will find that every so often some ingenious and thoughtful engineer will think up a new kind of distortion measurement. That's what happened when high quality transistor amps started replacing high quality valve (tube) amps. Some transistor amps whose measured distortion was below the threshold of human hearing nevertheless sounded worse than some valve (tube) amps whose measured distortion was worse. Prodded by this anomaly some new distortion measurements were discovered which showed that the transistor amps were indeed producing a new kind of audible distortion which hadn't previously been measured. -- Chris Malcolm |
#279
|
|||
|
|||
The disappearance of darkness
Eric Stevens wrote:
On Wed, 22 May 2013 17:46:09 -0400, Alan Browne The whole audio magazine industry is geared around deluding Audi O'Phile while advertising useless junk for him to buy. There is no doubt about that. Nevertheless, some junk is worth buying. True: http://www.theoldfoodie.com/2009/10/...junk-food.html http://en.wikipedia.org/wiki/Junk_(ship) And it's always worth something to the seller. -Wolfgang |
#280
|
|||
|
|||
The disappearance of darkness
Eric Stevens wrote:
On Wed, 22 May 2013 17:45:24 -0400, Alan Browne wrote: On 2013.05.21 20:10 , Eric Stevens wrote: It's well known among some sections of the audiophile community that the ear is much more sensitive than any instrument. People who believe their ears have more dynamic range, phase sensitivity and frequency discrimination than instruments have a really bad name for themselves: audiophiles. To a point they are right. Nobody has yet reduced the functioning of the ear to simple mechanics. They usually use electricity at some point. Just like --- the nerve cells in the ear. -Wolfgang |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[PIC] Between the Light and the Darkness | jimkramer | 35mm Photo Equipment | 12 | February 23rd 09 11:53 AM |
Framing in darkness | steamer | Digital Photography | 10 | January 31st 08 04:59 PM |
Lightness / Darkness of Images | Dave W | Digital Photography | 2 | December 3rd 05 05:55 PM |