31299038sound devicesPT2026-03-30 20:20:13UF31299039devices, soundNDUF31299040sound deviceNDBT31296981Sound DevicesPTNT31307643[sound devices by acoustical characteristics]PTNT31307644[sound devices by function]PTNT31307133sound device componentsPTNT31307645sound modifying devicesPTNT31307648audio maskersPTNT31307651audio oscillatorsPTNT31307654acoustical tonometersPTNT31307657clang analyzersPTNT31307662Galton whistlesPTNT31307666harmonometersPTNT31307668laboratory organsPTNT31307671opeidoscopesPTNT31307673reverberatorsPTNT31307675phonelescopesPTNT31307678phonodeiksPTNT31307680phonometersPTNT31307682phono-projectoscopesPTNT31307684phonorganonsPTNT31307687phonoscopesPTNT31307689photophonesPTNT31307691pseudophonesPTNT31307693quincke's tubesPTNT31307696Savart wheelsPTNT31307700vibroscopesPTNT31307702sonometersPTNT31307704sound cagesPTNT31307707sound controllersPTNT31307710sound generatorsPTNT31307713sound measurersPTNT31307716sound pendulumsPTNT31307720sound perimetersPTNT31307723sound receiversPTNT31307726sound recordersPTNT31307730sound reproducersPTNT31307733sound spectrographsPTNT31307736sound stimulatorsPTNT31307739sound transmittersPTNT31307742tone variatorsPTNT31307749strobilionsPTNT31307751tone difference apparatusesPTNT31307753tonoscopesPTNT31307755topophonesPTRT31353503audio equipmentPT