samcheetah
New Member
ive seen that public address systems are more vulnerable to noise than any type of amplifier system. maybe im wrong but thats my observation.
if someone is speaking on the microphone then for no reason a loud "teeeeeeeeeeeeeeeeeeee" voice starts to sound. what is that? i read something about ground loops in an article and it said that ground loops produce a 50Hz hum in audio-video systems. is that sound the 50Hz hum produced by ground loops? (i wish i could attatch an oscilloscope to my ear, then i wouldnt have been asking this question :lol: )
i know that this sound continues because a feedback loop begins in which the noise from the speakers enter the microphone and this further amplifies the noise and so on. but why is it so common in public address systems.
ive also seen this sound starting when a person unplugs the microphone from the jack without first switching off the amplifier. is this because the jack catches interference? does this have some connection to the ground loops?
if someone is speaking on the microphone then for no reason a loud "teeeeeeeeeeeeeeeeeeee" voice starts to sound. what is that? i read something about ground loops in an article and it said that ground loops produce a 50Hz hum in audio-video systems. is that sound the 50Hz hum produced by ground loops? (i wish i could attatch an oscilloscope to my ear, then i wouldnt have been asking this question :lol: )
i know that this sound continues because a feedback loop begins in which the noise from the speakers enter the microphone and this further amplifies the noise and so on. but why is it so common in public address systems.
ive also seen this sound starting when a person unplugs the microphone from the jack without first switching off the amplifier. is this because the jack catches interference? does this have some connection to the ground loops?