Sentence:  Few are like the Scottish fiddle-maker Amaryllis once met who had spent a cheerful life making violins out of oak (an impossibly <WSD>unacoustic</WSD> wood) on the happy premise that birds sing more beautifully in oak trees. 
Meaning of the word marked with <WSD> tags:  Having poor acoustic properties; not conducive to the projection of sound; tending to muffle or muddy sounds.