The Hungarian and the French trompettes work in opposite ways.
The French dog's foot rests on the soundboard by default. When the wheel speed is increased, the
string is pulled higher on the wheel by the "stick" portion of the stick-slip cycle, and
the dog's foot is lifted along with it. When the string moves down during the "slip"
portion, the dog is pulled down onto the soundboard.
The Hungarian dog's foot rests up in the air by default: there is no contact
between the foot and the soundboard when the string is at rest. When the
string vibrates gently, it causes the dog's foot to wave up and down in the
air. When the wheel speed is increased, the string vibrates more strongly, and
the dog's foot waves farther up and down. In doing so, it hits the soundboard
at the lower end of its arc, and causes the buzzing sound.
Alden
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