Οπτικοποίηση, μήπως βοηθήσει, από τη
Wikipedia:
Hourglass drums are a class of membranophone, or drum, characterized by an hourglass shape. They are also known as
waisted drums. Drumheads are attached by laces, which may be squeezed during a performance to alter the pitch. The category also includes pellet drums such as the
damaru, although not all pellet drums are hourglass shaped (such as the Korean
do,
nodo,
noedo, and
yeongdo, which are barrel shaped).
Επίσης:
The
talking drum is a Nigerian drum whose pitch can be regulated to the extent that it is said the drum "talks" and can be used for drum communication. Talking drums are
hour-glass shaped with two heads...
Τα τύμπανα του πολέμου, δηλαδή.
Άσχετη απορία: Εσείς οι κυρίες που τα ξέρετε αυτά, το μεσάτο είναι το ίδιο με το εβαζέ, που κάπου κάποτε είχε πάρει το αυτί μου;