F.A.Q.    Register    Login    Home Members    Search

Toymods » Tech & Conversions » tweeters? Show: Today's Posts  :: Show Polls  Email to friend

Author	Topic
mynameisrodney Forums Junkie Location: Kellyville, Sydney Registered: June 2004	Re: tweeters? Wed, 02 November 2005 02:09 holy crap. i can not believe you got a phys degree. Quote: Higher frequencies tend to be more 'directional' than lower frequencies. Higher frequencies have a higher average power for any given section of the wave, than lower frequency waves. This doesn't mean they are 'louder' or have a higher peak amplitude... it just means they have higher power. Follow me along this thought experiment. I'll assume you are familiar with the 'wave' in a stadium, whereby a line of people stand up and sit down in succession. Imagine these people, instead of getting up and down, are getting up and down on a step. The speed that the wave goes around the stadium is dependent on how fast each individual person gets up, since the next person in line has to wait for the previous person to move. Now, let's say on two different days, you have two different waves. To make a wave with higher frequency, that is, to make a wave that goes up down more times in one second, you need the people to stand up and down very fast. They would use a lot of energy to do it. If you wanted the wave to move slower, you would tell them to take their time getting up. They wouldn't spend much energy at all. The amplitude, or the height of the wave, is going to be determined by how high the step is... the power of the wave is how much energy the people have to expend to get up and down it a number of times in one minute or second, etc. So. Low frequencies, because of the big distance between the peaks and troughs of the wave... tend to go 'around' objects that are in their way. That is, the wave can maintain it's shape and still bend. High frequencies are narrow, because of their higher power, and very tightly packed. They have the tendency to 'bounce' off of objects in their way. Foghorns have a very high amplitude, and a very very low frequency. That way they won't be blocked by ships or rocks in the water. It ALSO means that they tend to 'bend' along the curvature of the Earth. from www.physlink.com the reason you dont hear the high freq wave through the mdf is because it is reflected NOT absorbed. tweeters need less energy because they are very directional, all the energy is pointed straight at your head. subs need more because the waves spread out around the car (and around the neighbourhood depending on how much tosser you are) and so the proportion of thew waves that reaches your ears is low. a lot of energy from subs is also lost as mechanical energy (making stuff vibrate) [Report message to a moderator]

	Subject	Poster	Date
	tweeters?	Big Rob	Fri, 28 October 2005 13:44
	Re: tweeters?	willwal98	Fri, 28 October 2005 16:23
	Re: tweeters?	clubagreenie	Fri, 28 October 2005 23:28
	Re: tweeters?	Big Rob	Sat, 29 October 2005 00:34
	Re: tweeters?	willwal98	Sat, 29 October 2005 01:40
	Re: tweeters?	Phrostbyte	Sat, 29 October 2005 14:05
	Re: tweeters?	sagluren	Sun, 30 October 2005 10:59
	Re: tweeters?	willwal98	Sun, 30 October 2005 11:18
	Re: tweeters?	feral4mr2	Sun, 30 October 2005 11:52
	Re: tweeters?	illuminatus	Sun, 30 October 2005 14:30
	Re: tweeters?	Kurt.R	Sun, 30 October 2005 23:24
	Re: tweeters?	mynameisrodney	Mon, 31 October 2005 00:12
	Re: tweeters?	mic*	Mon, 31 October 2005 02:25
	Re: tweeters?	Big Rob	Sun, 30 October 2005 23:29
	Re: tweeters?	Big Rob	Mon, 31 October 2005 04:21
	Re: tweeters?	Big Rob	Mon, 31 October 2005 04:24
	Re: tweeters?	Johnny	Tue, 01 November 2005 06:22
	Re: tweeters?	mynameisrodney	Tue, 01 November 2005 07:34
	Re: tweeters?	illuminatus	Tue, 01 November 2005 22:10
	Re: tweeters?	Johnny	Wed, 02 November 2005 01:38
	Re: tweeters?	mic*	Wed, 02 November 2005 01:58
	Re: tweeters?	mic*	Tue, 01 November 2005 08:26
	Re: tweeters?	mynameisrodney	Tue, 01 November 2005 09:07
	Re: tweeters?	love ke70	Tue, 01 November 2005 11:44
	Re: tweeters?	mic*	Tue, 01 November 2005 22:26
	Re: tweeters?	Big Rob	Wed, 02 November 2005 00:15
	Re: tweeters?	mic*	Wed, 02 November 2005 00:28
	Re: tweeters?	andurils_sheath	Wed, 02 November 2005 01:56
	Re: tweeters?	mic*	Wed, 02 November 2005 02:05
	Re: tweeters?	andurils_sheath	Wed, 02 November 2005 03:50
	Re: tweeters?	Johnny	Wed, 02 November 2005 05:34
	Re: tweeters?	mynameisrodney	Wed, 02 November 2005 02:09
	Re: tweeters?	mic*	Wed, 02 November 2005 02:37
	Re: tweeters?	mynameisrodney	Wed, 02 November 2005 02:49
	Re: tweeters?	mic*	Wed, 02 November 2005 06:08
	Re: tweeters?	mic*	Wed, 02 November 2005 06:10
	Re: tweeters?	mynameisrodney	Wed, 02 November 2005 06:10
	Re: tweeters?	Big Rob	Wed, 02 November 2005 09:11
	Re: tweeters?	mic*	Wed, 02 November 2005 22:57
	Re: tweeters?	mynameisrodney	Wed, 02 November 2005 23:10
	Re: tweeters?	mic*	Wed, 02 November 2005 23:20
	Re: tweeters?	mynameisrodney	Thu, 03 November 2005 00:51
	Re: tweeters?	mic*	Thu, 03 November 2005 01:17

Previous Topic:	Equip an ae86 with 4agze
Next Topic:	4ye into 3y Hilux

Powered by: FUDforum 2.3.8
Copyright ©2001-2003 Advanced Internet Designs Inc.