Dr. Ilham Bahat, PhD's page

Masterwork Leather Choker:
Sitting comfortably around the neck, this choker let's the wearer know when he is constricting his vocal cords too much or not enough to be heard from farther distances. He can tighten it to adjust the resistance, and must always use it before performing.
This is a masterwork tool for Perform (Oratory).

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Yes I made it up just now.
Other variations could include:
cloth versions, women's choker necklaces, a harmonizing earpiece (to allow you to check the acoustics of the room.

I actually completely disagree with the ruling thus far on Cleave and Overhand chop.

Cleave: Benefit: As a standard action, you can make a single attack at your full base attack bonus against a foe within reach.

Overhand chop: when a two-handed fighter makes a single attack (with the attack action or a charge) with a two-handed weapon, he adds double his Strength bonus on damage rolls.

So let's read the attack action.

Attack

Making an attack is a standard action.

Putting it all together.

So if this were math,
Attack = Attack Action
Cleave = as a standard action make a single attack.
Overhand chop = double strength on a single attack.
So
Cleave = as a standard action make a single (attack action)
Overhand chop = double strength on a (cleave)

That's how I see it anyways.
On the other thread they were looking at the high level actions rather than the actual wording.

Regardless I'm flagging this as an FAQ candidate.