Dawn Patrol: July 6, 2009 ctd.

The technical term for Abby's sound of the week is "bilabial trill."

From wikipedia.com:

Features of the bilabial trill:

Its manner of articulation is trill, which means it is produced by vibrations of the articulators. In most instances, it is only found as the trilled release of a prenasalized stop.

Its place of articulation is bilabial which means it is articulated with both lips.

Its phonation type is voiced, which means the vocal cords are vibrating during the articulation.

It is an oral consonant, which means air is allowed to escape through the mouth.

It is a central consonant, which means it is produced by allowing the airstream to flow over the middle of the tongue, rather than the sides.

The airstream mechanism is pulmonic egressive, which means it is articulated by pushing air out of the lungs and through the vocal tract, rather than from the glottis or the mouth.

And you thought that what she was doing was easy.