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#124397 - 12/01/06 08:44 PM Lock Re: Physics behind rim shots [Re: ]
HybridRudi Offline
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Registered: 10/18/05
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Look you guys. Stop trying to avoid the obvious. What happens in order to make a rim shot? The stick makes contact with both the head and the RIM. Where do you think the energy from the rim goes? Into the shell! Not only do you have air between heads vibrating, but now youve made the entire drum vibrate. How could say a rimshot is not louder. thats the whole idea of the rimshot. A louder sound for an big accent or impact. Theres no such thing as a three inch rimshot. You put more velocity behind the stick when you play when, and that sends more energy into MORE of the drum. thats what makes it loud, and yes it is louder.




Are you suggesting that rimshots come in one volume?

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#124398 - 12/02/06 12:42 PM Re: Physics behind rim shots [Re: HybridRudi]
TBoneLaForge Offline
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Yeah I think we've all pretty much identified that you can play rim shots at any volume, but what makes rim shots distinctive?

I posit that there is a different, higher set of frequencies being produced. One theory that I agree with is that the shell is vibrating and reinforcing the vibration of the head. Another thing I think is happening, is that at the moment when the stick contacts the rim, that force is actually tightening the head a little bit. Thus, the actual strike of the stick on the head excites a higher frequency range than normal. You can even see this phenomenon on the floor tom of your drum set. Just hit the drum while pressing down hard on the rim and you will hear the frequency go up slightly.

There has been at least one thread on this before, and here's a link to one of them.

http://www.drumlines.org/threads/showflat.php/Cat/0/Number/128307/page/0/fpart/1/vc/1
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#124399 - 12/03/06 04:43 PM Re: Physics behind rim shots [Re: TBoneLaForge]
Anonymous
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It's basically shock wave interference. When the wave caused by the head meets with the wave caused by the rim the amplitudes add up.

There is also an excessive release of energy from the stick because when the tip hits the head it wants to bounce up and when the middle of the stick hits the rim it wants to bounce up. Since both these actions can't be done at the same time the energy is released into the shell. That's why the more "perfect" of a rimshot you do, the more your stick feels like it's being sucked down. All the energy that usually bounces your stick back has been absorbed into the shell.

Have you ever been on a trampoline with another person and you both jump really hard at the same time? Well what happens? When you guys land one of you barely gets anything (the stick energy) and the other one goes flying (the shell energy). It's the same basic idea. One person on that trampoline did a rimshot to the other person.

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#124400 - 12/05/06 12:32 AM Re: Physics behind rim shots [Re: AlexGrant]
cubanochulo Offline
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I don't think you even need the rim for the rim shot. Have you ever tried a rim shot when you play on a table? By smacking the stick flat against the table, you make a loud noise with minimal force applied. The more area of the stick coming in contact with the surface, the louder it's going to be. Why? Easy, when you hit a drum, the stick vibrates in your hand and the stick bounces back up. The kinetic energy you put into the stick by accelerating it towards the drum head is only partially converted into sound. When you make the stick almost parallel with the head, you get a lot of contact area. Notice that the stick rebounds less with the strokes, and the really loud ones where most of the stick is used, there is almost no rebound at all. This is because a much larger portion of that kinetic energy was converted into sound energy.

Coolname, your theory is faulty. Energy travels in waves, but not because you hit the rim and the head at the same time. Hit the rim alone. You're only passing energy to the shell.
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#124401 - 12/05/06 01:12 PM Re: Physics behind rim shots [Re: cubanochulo]
Anonymous
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Quote:

I don't think you even need the rim for the rim shot. Have you ever tried a rim shot when you play on a table? By smacking the stick flat against the table, you make a loud noise with minimal force applied. The more area of the stick coming in contact with the surface, the louder it's going to be. Why? Easy, when you hit a drum, the stick vibrates in your hand and the stick bounces back up. The kinetic energy you put into the stick by accelerating it towards the drum head is only partially converted into sound. When you make the stick almost parallel with the head, you get a lot of contact area. Notice that the stick rebounds less with the strokes, and the really loud ones where most of the stick is used, there is almost no rebound at all. This is because a much larger portion of that kinetic energy was converted into sound energy.





True but there is a little difference between the "slap" effect and a rimshot. You have to remember that the amount of surface area that you add when playing a rimshot compared to a standard hit is really small.


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#124402 - 12/05/06 09:26 PM Re: Physics behind rim shots [Re: x3drumbum3x]
mrpainless45 Offline
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Quote:

I'm not so sure that it is necessarily louder from a volume standpoint. I think it may just be that the sound cuts better since the pitch is much higher.




That's probably why they seem "louder". I mean if you were taught to play rimshots like i was, it's about placement, not power.
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#124403 - 12/05/06 09:49 PM Re: Physics behind rim shots [Re: mrpainless45]
pie Offline
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Im gunna have to go with xope, the visual diagram explains all
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#124404 - 02/18/07 09:13 PM Re: Physics behind rim shots [Re: pie]
HybridRudi Offline
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From a physics standpoint, xope's idea stands above all.

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#124405 - 02/21/07 09:29 PM Re: Physics behind rim shots [Re: ]
hgtenors Offline
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True but there is a little difference between the "slap" effect and a rimshot. You have to remember that the amount of surface area that you add when playing a rimshot compared to a standard hit is really small.






what he said

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#124406 - 02/22/07 04:48 PM Re: Physics behind rim shots [Re: hgtenors]
Anonymous
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I found something sort of interesting. It doesn't even take the rim to make a shot type of sound. Try this-

Hold a stick in your left traditional, and close your fingers around it. You should be holding the stick tightly in your fist with about 3-4" popping out, and the butt at the top. If you don't death grip the stick, this doesn't work as well, so clamp down. Place the end of the stick (still in your fist) near the rim, and with your right hand try to do as you would with a shot, hitting the butt of the drumstick and the head. If done correctly, you get a loud, shot like sound.

This is interesting, as it leaves only a few theories that could be correct. Thoughts?

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