'always on'-Intercom question





Results 1 to 4 of 4
  1. #1
    Join Date
    Nov 2011
    Location
    Cape Town
    Age
    52
    Posts
    1,533
    Thanked: 1019

    Default 'always on'-Intercom question

    A technical question from an affirmed electoniphobe....

    Anyone know of a very basic 'talk-through-the glass, rocker-switched, always on' intercom system -or possibly a 'push-to-talk' type, but operated from a foot-press-TALK button?

    The idea is that communication is required through a piece of glass, but without any holes for possible air-contact , thus requiring an intercom system with mic+spk on either side -but both speakers' hands will be engaged, so they are unable to use handsets of press a button with hands -foot-press button is fallback option if a toggle-switched 'always on' will not be possible. There is also no avenue to 'fine-tune' the positioning of the units to be able to physically mitigate the feedback.

    I have discussed this with several specialists in the field, but they advise that the major problem with a system that is 'always on', is the sound feedback issue.

    Anyone know of such system? -or could cobble a few reasonably presentable such units together -preferably in CT?

    Thanks in advance ---over...?.
    "The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence."

    - Charles Bukowski

  2. #2
    Join Date
    Mar 2008
    Location
    De Wildt
    Age
    57
    Posts
    38,679
    Thanked: 15005

    Default Re: 'always on'-Intercom question

    You do get throat microphones that only activate when they detect the start of speech. In other words, voice-activated.......

    F_D can help with that.
    Jakes Louw
    2012 Jeep Sahara Unlimited 3.6 V6
    Percivamus

  3. #3
    Join Date
    Nov 2011
    Location
    Cape Town
    Age
    52
    Posts
    1,533
    Thanked: 1019

    Default Re: 'always on'-Intercom question

    Quote Originally Posted by jelo View Post
    You do get throat microphones that only activate when they detect the start of speech. In other words, voice-activated.......

    F_D can help with that.
    Thanks.
    I will send FD a pm if he doesn't pop up here himself! Woof!

    I had presumed there is such a thing as voice-activated switching, but I expect this may delve into digital+analogue electronics, rather than analogue electronics only, so would become a programmed-chip system, and possibly quite time-consuming and expensive to produce -am hoping for an old-school solution that an electronics/sound fundi might knock together quite quickly and cheaply with bits from A1 Radio. The units are for use in unsophisticated environments, so effectively need to be foolproof and simple. Could be mains or battery operated.
    "The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence."

    - Charles Bukowski

  4. #4
    Join Date
    Sep 2008
    Location
    Vanderbijlpark
    Age
    51
    Posts
    1,831
    Thanked: 185

    Default Re: 'always on'-Intercom question

    If there is glass in between the two stations, feedback is unlikely to be a problem - if you keep volume to acceptable limits. Almost all of the standard wired house / complex-type intercoms are full duplex, meaning both parties can talk and listen at the same time, which is what you need. Neither party needs to push or activate a PTT (push-to-talk) button - the button is usually just to call.
    Last edited by An3s; 2020/08/14 at 01:28 PM.
    ZS6VL


Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •