Wattage has nothing to do with volume. It's the SPL rating you should look at.

RigorMortis

Rather than alleviate, I fear this gizmo may amplify conflicts between parent and child! :)

Quips Ahoy!

A paddle, or a bull whip. Either way, much more effective than this mega?phone.

bms

Yes, the paddle...or the bull whip. Either way, much more effective than this mega?phone.

bms

My dad would fold a leather belt in half, hold each end, and snap the slack against itself, yelling, "Put your hand in here!!" Eventhough we all knew it didn't hurt when you put your hand in there, somehow it was very effective.

SuperCollider

I had something like this. I kept it in my car for road rage situations. Also for singing 4 non blondes while stuck in traffic. Someone stole it. But they can never steal the music in my heart.

Git Em SteveDave thinks a friend with weed is better

Naw, it just needs a spike on the bottom of the handle for that added little bit of "persuasion."

adamator

When I was young, my mother would make us wait in our room for my dad to come home if we got in trouble. Those hours in there counting down to his return from work were almost as painfull as his belt on our bare ass. No divorcing your parents back then, just brutal punishment. In a weird sort of way I kind of thank them for it. We all turned out just fine.

TerryinSt.Paul

@SuperCollider: Lucky you...when my dad cracked the belt you knew someones ass was gonna be red...

Loker

I guess you could slap your kid with it if they still refuse to listen to you, but nowadays you would get arrested for such behavior.

SomeoneUKno

My dad never hit me, he was smarter than that.

Emotional scarring lasts a lifetime.

Chester_Copperpot

The best method is the time and mother tested use of the childs FULL name.
"John.....John....John.....JOHN JACOB JINGLEHEIMER SCHMIDT!". When they hear their whole name, they know the time of reckoning is at hand and no mercy will be shown as mom is already mad.
I also note some other ways to get the childs notice: turn off the TV, or monitor or video game or whatever they are doing so as to not pay attention, or fake them out with the old bait-and-switch of asking if they are hungry (they always are) and while you have their attention, then tell them whatever it was they should have listened to on their own 5 minutes ago anyway.

Curves

@Curves: I knew when I was in trouble when my middle name was called out: "GODDAMMIT!"

Kaiser-Machead's Chips Ahoy!

What about a full-facial lens that magnifies the icy scowl of death?

Kaiser-Machead's Chips Ahoy!

A megaphone to talk to your child? If you can't speak to your child, without her/she trying to talk over you, then your obviously lacking in the disciplinary part. It got to a point where my parents didn't even have to pull out the belt; they just changed their tone or gave the look and you knew to straighten up or you wouldn't like whats coming next.

spimoles

I need to get this for the wife. If only to amplify the pointlessness of yelling at kids vs time out, butt smack, taking away of toys, etc.

AllThingsWireless

When the kids act up, I tase them. Nothing like 50,000 W to get a child's attention. When they f' up, I f' them up.

LastGunslinger

No yelling was necessary in my home; Dad just pulled out his massively massive weight lifting leather belt of Doom, and we listened to him.

Karinabob