The invention relates to a test device for measuring acoustic quantities of telephone sets. To measure the loudness rating, the handset (2) is placed into a moulded shell (1) and pressed against an artificial ear (5) and an artificial mouth (4). <IMAGE>
申请公布号
DE3834261(A1)
申请公布日期
1990.04.12
申请号
DE19883834261
申请日期
1988.10.08
申请人
DEUTSCHE BUNDESPOST, VERTRETEN DURCH DEN PRAESIDENTEN DES FERNMELDETECHNISCHEN ZENTRALAMTES, 6100 DARMSTADT, DE
发明人
KLEINE-BARDENHORST, HEINRICH, 4430 STEINFURT, DE;PRUEMER, LUDGER, 4441 WETTRINGEN, DE
