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audio - How does the phone detect if 3.5 mm jack circuit ...
https://electronics.stackexchange.com/questions/95575/how-does-the-phone-detect-if-3-5-mm-jack-circuit-is-closed
Stereo Line Out Audio Cable; Stereo Headphone; By default, it needs to see 8-700 Ω on one of the headphones pins to detect a device, and looks for 1.5 to 20 kΩ …
audio - Detect acoustic echo or sidetone in sound file or ...
https://stackoverflow.com/questions/13301775/detect-acoustic-echo-or-sidetone-in-sound-file-or-device
I need to detect acoustic echo/sidetone from a unmuted telephone handset. Basically I am calling a telephone handset on my mic muted computer. I then play a sound from the computer to the phone and record the incoming audio from the handset. I need to detect if the telephone I called was on mute or not.
Detect DTMF Tones - DialABC
http://www.dialabc.com/sound/detect/
Detect DTMF Tones. DialABC lets you find DTMF tones within audio clips. All you have to do is to upload an audio file to the dialabc web site using the form below. Our software then analyzes the audio recording and presents you with some statistics, a graph and a table showing you what DTMF tones are contained in the data and where.
Telephone Paging Matrix | HiQnet Audio Architect
https://audioarchitect.harmanpro.com/en-US/audio-architect-applications_telephone_paging_matrix
• Detect a two-digit DTMF number • Route the Telephone Hybrid audio to the appropriate zone • Automatically clear the router • Reset the logic circuit at the end of the call. The first action of the circuit is initiated by the Telephone Hybrid card going ‘off-hook’ when automatically answering a …
Testing audio before Zoom Meetings – Zoom Support
https://support.zoom.us/hc/en-us/articles/201362283-Testing-audio-before-Zoom-Meetings
Click the Audio tab. Follow the sections below to test your speaker or microphone. During a meeting. You can access your audio settings and test your audio when you are already in a meeting. In the meeting controls, click the arrow next to Mute/Unmute. Click Audio Options.; this will open your audio settings. Checking your computer speakers
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