Definition of soundboard in English:
 soundboard
(also sounding board)
nounˈsaʊn(d)bɔːdˈsaʊn(d)bɔrd
A thin sheet of wood over which the strings of a piano or similar instrument are positioned to increase the sound produced.
 Example sentencesExamples
-  Frank once had me cut a piece of foam out and mount a Pignose amp on the harp of a Bosendorfer grand piano, pointing down to the soundboard in the piano.
 -  Non-expanded polycarbonate struts under the soundboard provide the stiffness that is needed to withstand the tension from the strings.
 -  The soundboards are made of the finest wood and there is more hands-on work and design by the top craftspeople in the field.
 -  They began to construct the entire instrument out of wood, even the soundboards which were previously made with rawhide.
 -  The piano's construction, with its longest strings and the majority of its soundboard in the lower register, makes bringing out soprano lines especially difficult.
 
  Definition of soundboard in US English:
 soundboard
(also sounding board)
nounˈsoun(d)bôrdˈsaʊn(d)bɔrd
A thin sheet of wood over which the strings of a piano or similar instrument are positioned to increase the sound produced.
 Example sentencesExamples
-  The piano's construction, with its longest strings and the majority of its soundboard in the lower register, makes bringing out soprano lines especially difficult.
 -  The soundboards are made of the finest wood and there is more hands-on work and design by the top craftspeople in the field.
 -  Non-expanded polycarbonate struts under the soundboard provide the stiffness that is needed to withstand the tension from the strings.
 -  Frank once had me cut a piece of foam out and mount a Pignose amp on the harp of a Bosendorfer grand piano, pointing down to the soundboard in the piano.
 -  They began to construct the entire instrument out of wood, even the soundboards which were previously made with rawhide.