A voice operated relay / Nor Hasnah Hassan

• Main Author: Hassan, Nor Hasnah
• Format: Thesis
• Language: English
• Published: 1985
• Subjects: Broadcasting. Radio and television broadcasting; Artificial satellite telecommunications
• Online Access: https://ir.uitm.edu.my/id/eprint/71045/1/71045.PDF; https://ir.uitm.edu.my/id/eprint/71045/

Voice operated relay is actually a device allows virtually hand-free operation of the radio. It sampled the sound from a microphone and switched a relay when the level of the microphone exceed the preset level. The relay is held on as long as the sound level stays above the threshold and when the mi...