2.1 In known radio receivers, a signal tone is emitted via a loudspeaker when the received field strength falls below a specific level. 2.2 It is proposed that a noise signal be used as an acoustic signal so that a user is disturbed as little as possible by this acoustic signal. <IMAGE>
申请公布号
DE4020694(A1)
申请公布日期
1992.01.02
申请号
DE19904020694
申请日期
1990.06.29
申请人
PHILIPS PATENTVERWALTUNG GMBH, 2000 HAMBURG, DE
发明人
SCHOEFFEL, PETER, DR.-ING., 8551 KIRCHRUESSELBACH, DE
