Detection of a "beep-beep" chime
Hi
I'm trying to detect a "beep-beep" signal with a given frequency and duty cycle. The idea is that one system/node sends out a "beep-beep" generated using for example the Chime Freq-Gain and that this "beep-beep" is then detected by another system/node.
I'm new to SigmaStudio so all suggestions are greatly appricated. Currently I'm working with the ADAU1761.
Best regards,
Per
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SigmaDSP Audio Processors
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This sounds like it could be difficult, but not impossible. It really depends on the details of your application.
At first glance, it sounds like you could use a detector scheme similar to what you'll see at the bottom of this thread: https://ez.analog.com/message/7669#7669
You'd have to implement a bandpass filter prior to the detector so that you're monitoring a very specific frequency. This scheme would require that there isn't a whole lot of other noise in the signal at that particular frequency so you could set a threshold to determine if that beep signal is "on" or "off".
There's probably a way to calculate duty cycle using our zero cross detector cell, but that would likely be quite complicated.
This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.
Thank you,
EZ Admin
Dear ADI,
The following link is either broken or expired
ez.analog.com/.../7669
Ca someone direct me to this link ?
Hello,
The forum software changed a few years ago and a lot of links were broken. I don't think we have a way to find the new link without knowing the post title.
However, you may find this page interesting:
https://ez.analog.com/dsp/sigmadsp/f/q-a/122186/adau-1701-frequency-meter
Joshua
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