21. The idea hence followed of putting a microphone directly in the sound box , which gave a more precise result. 22. He demonstrated his apparatus to the Royal Society by magnifying the sound of insects scratching through a sound box . 23. The instrument's sound box is made from a bottle gourd, which is covered on the playing end with snake skin. 24. Camac s solid-body harp had neither a sound box nor soundboard, and equipped with a piezoelectric microphone on each string. 25. The Appalachian dulcimer ( or mountain dulcimer, or lap dulcimer ), is a scheitholt fingerboard mounted on a larger sound box . 26. The installation of the lift meant that the previous ladder access to the lighting and sound boxes could no longer be used. 27. The circular sound box ( qQ�?{ ) body is made of a combination of front board, back board and side board. 28. The sound box of the instrument is covered with a tightly stretched kidskin or lizard-skin, as in a rabaab or a sarod. 29. In 1972, the first Camac harp model was offered for sale, the Bardique " : an instrument with a plane-parallel sound box . 30. Around 1900 B . C . arched harps in the Iraq-Iran region were replaced by angular harps with vertical or horizontal sound boxes .
