Sidetone in VHF communication

Discussion in 'Wireless & RF Design' started by guru200773, May 28, 2010.

  1. guru200773

    Thread Starter Member

    Apr 26, 2010
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    what is sidetone in VHF communication? what is the need for it? Can any one explain pls?
     
    Last edited: May 29, 2010
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    The speaker's voice (yours) is combined with the receive audio path so that you get the comforting sound of your own voice feeding back along with the incoming audio, particularly when you have headphones on - sort of similar idea to the fold-back that musicians use on stage. Probably stops you from speaking too loudly - as I tend to do when I speak while wearing hearing protection.

    Sidetone is also used on telephones. At least it once was in the old days. I guess it still is.
     
    Last edited: May 30, 2010
  3. guru200773

    Thread Starter Member

    Apr 26, 2010
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    thanks friend.. if side tone is not there Y it seems that phone is not working? Any reason for this?
     
  4. rjenkins

    AAC Fanatic!

    Nov 6, 2005
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    Some people also refer to subtone or sub-audible tone systems as sidetone.

    If that is what you are refering to, it is a form of selective call or tone squelch system

    A frequency below the normal speech band is added at the transmitter, say 67Hz.
    The receiver only enables the audio (or opens the squelch) if it detects that specific frequency in the receive audio.

    This allows different users to share a radio channel without hearing each other's conversations.
     
    guru200773 likes this.
  5. guru200773

    Thread Starter Member

    Apr 26, 2010
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    hmmm thanks dude
     
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