Talk:Loudspeaker
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[edit] "Edison issued a patent"
Thomas Edison issued a British patent
Where I grew up, only governments could issue patents. Occurs several times in the article. Jidanni (talk) 02:03, 16 March 2008 (UTC)
- Clearly should be '...was issued...' as the phrasing here is unclear to at least one reader. Go ahead and change it. 04:49, 18 March 2008 (UTC)
- It smells like a regional linguistic oddity. Surely meant 'was issued' in more usual terms. I've noted it myself, but wasn't hunting odd phrases at the time. Be bold and change it. ww (talk) 22:48, 31 May 2008 (UTC)
- I changed it, but "was issued" seems a bit too passive - as if he did not invent the method. Is anyone else picking up on that?--82.152.178.100 (talk) 13:31, 7 June 2008 (UTC)
[edit] Electromagnetic effects
I have hear before that speakers should not be placed next to TV screens because they could cause damage. I don't know whether this is true or not. Can powerful speakers cause damage to the TV? What types of TV will be affected?
- Not damage, but interference with the quality of hte picture in the case of TVs using cathode ray tubes. LCD, plasma, and projection TVs are effectively immune. The problem is stray magnetic fields from the driver magnets. If these are shielded, than the interference is minimal and perhaps even absent. Some drivers are shielded, and it is a selling point, so manufacturers usually include this as a feature.
Also what other things, such as wireless router can damage speakers
- Heat, decay (ie, insects, mold, pollution, ...), over driving into mechanical damage, DC signals (even very little), inquisitive childrena and pets, accident, deterioration from old age, ... The cabinets, of course can be damaged by any number of things, and if those cause structural damage (ie, opened joints), then the performance of the speaker will suffer, perhaps badly, even if the drivers are in perfect shape.
Finally, do amplification units generally have inbuilt controls to stop its speakers being damaged by exceeding the speakers'
- No. The problem is very difficult, varies with frequency (tweeters are much more fragile), and depends on the very recent history of the the signal the speaker has been exposed to.
Rated powers, is this built into the speakers themselves, or is there normally no protection in place?
- There is normally no protection in place. Rated power, to the extent the specification has any meaning at all (often seems to have been invented by the marketing department) refers to safe amplifier power while playing reasonable signals at reasonable levels. A very small amplifier driven into clipping (ie, very severe distortion) is dangerous to any loudspeaker whatever its rating. And, a very low rated speaker will be perfectly safe driven by a very large amplifier in good condition if the signal and level are kept reasonable. There is no satisfactory rating technique which can help with this problem. Consider that some electronic music (eg, some electronica, some techno, etc) has signals which are very low, very sustained, and often played loud. These are dangers to any speaker intended for home use.
(So that I'm not just asking questions in the discussions section) should any of this information be put into the article?
- The problem is sufficiently tangled that it would be more than the article could manage if well covered. A brief section noteing the issue and its complications and referring to a separate article would probably be the way to go. ww (talk) 19:04, 7 June 2008 (UTC)
Thanks very much--82.152.178.100 (talk) 13:27, 7 June 2008 (UTC)
- Thanks for such a detailed answer, ww; it is appreciated --82.152.178.100 (talk) 15:36, 8 June 2008 (UTC)
[edit] Possibility of article split
The different types of loudspeakers section might be a little to large. May I suggest it be moved? I have no idea of WP policy on movements (and currently don't have enough time to find out or discuss this in further detail --82.152.178.100 (talk) 13:27, 7 June 2008 (UTC)
- This question has been considered at some length here (see talk archive). The decision has, in effect, been to include the variety of drivers section, rather than split it out into a separate article. The article is long, but the subject is complex (rather more than many folks wish, but if wishes were horses....) and the article shouldn't mask the complexity.
- This is one of the few areas of life in the developed world where engineering detail impinges on consumer choice in a way that allows the consumer an option. In general, consumers are not offered the choice of different engine types (gasoline, steam, electric, equine, ...) when buying a car. In loudspeakers, one can have electro-dynamic, ribbon, mixed ribbon and electro-dynamic, electrostatic, and on and on. Stirred into the mix as well, any number of enclosure types (reflex, acoustic suspension, transmission line, horn, ...). And every choice can be, and often is, audibly different. ww (talk) 19:12, 7 June 2008 (UTC)
