IoT-based management system of seats for pregnant womans in train
KR102204505B1
Power control apparatus and method for integrated audio amplifier
KR102159314B1
right and left compatable ear-mic set device
KR102103598B1
emergency broadcasting telecommunication system for railway trains based on digital wireless communication
KR102027214B1
spike-relief power control device for sensor lights which having constant voltage constant current converter
KR101994690B1
lighting device of multi-channel cancelation of interlayer noise
KR101957506B1
method of providing setup of lighting configuration for group sensor lights based on autonomous wireless relay
KR20190019473A
wireless autonomous group-control system of sensor lights, and wireless autonomous sensor light device for the same
KR20190018252A
Automatic recognition method of connected sequence of speakers
KR20180012163A
disaster broadcasting system of trains based on digital short-range wireless relay
KR20170115766A
The method for determining communication channel, the Intercommunication System and Apparatus for determining the communication channel
WO2016047992A1
Operation method of dynamic channel management-based wireless intercom system, and computer-readable recording medium for same
KR101504715B1
Class d audio amplifier installed automatic damping compensation function
KR101484098B1
method of providing operatiopn of wireless intercom system based on relay expanding mechanism, and computer-readable recording medium for the same
KR101487389B1
Audio data delay apparatus using single memory of page unit
KR101446252B1
Amp containing a PWM signal controlling ciruit using detection of input signal
KR101445317B1
Public address broadcasting system by using TTS(Text to Speech) supporting multiuser
KR101319816B1
Group managing method for selective subgroup call mode in wireless intercom devices, and wireless intercom system for providing selective subgroup call
KR100944182B1
Apparatus and method of auto switching for public address broadcasting system with digital audio packet and recoding medium