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Author Topic: That Annoying 400Hz Tone  (Read 1042 times)

Offline RayS

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That Annoying 400Hz Tone
« on: October 10, 2017, 01:05:11 AM »
First it was mood-lighting, now it's an annoying 400Hz tone....

Regardless, it's a part of my sound system now. Been taking a few swings at this lately but finally had some success with it when I injected the tone not into the intercom Mic or headset, but into the intercom ground plane.  Key the mic, get the tone, faint as it is. (Even the guys over at PilotEdge said it sounded good.. but annoying. :-)

Tone is generated as a 400Hz square wave (using a Teensy 3.5) which closely mimics the tone on the flight deck. It's on when either the left or right PTT buttons are pressed.
« Last Edit: October 10, 2017, 01:22:33 AM by RayS »
Ray Sotkiewicz

Offline bernard S

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Re: That Annoying 400Hz Tone
« Reply #1 on: October 10, 2017, 09:30:38 AM »
had same issue the fix is change the frequency on the chip failinh that you have to insulate the card

Offline RayS

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Re: That Annoying 400Hz Tone
« Reply #2 on: October 10, 2017, 12:15:44 PM »
Oh no.. the tone is entirely intentional.

 : :o 8)
Ray Sotkiewicz

Offline 727737Nut

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Re: That Annoying 400Hz Tone
« Reply #3 on: October 10, 2017, 12:56:25 PM »
Just use real parts then no need to "inject" the signal.  ;)   I get that comment all the time on how real it sounds on PE.  Makes me laugh.
737 Junkie

Offline RayS

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Re: That Annoying 400Hz Tone
« Reply #4 on: October 10, 2017, 01:41:04 PM »
Just use real parts then no need to "inject" the signal.  ;)   I get that comment all the time on how real it sounds on PE.  Makes me laugh.

Ok, now you're just showing off, Rob! ;-)
Ray Sotkiewicz

Offline 727737Nut

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  • First Name: Rob Archer
Re: That Annoying 400Hz Tone
« Reply #5 on: October 11, 2017, 11:02:56 AM »
Just use real parts then no need to "inject" the signal.  ;)   I get that comment all the time on how real it sounds on PE.  Makes me laugh.

Ok, now you're just showing off, Rob! ;-)

 :huh:   ;D
737 Junkie

 

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