I have been asked to write an algorithm in Java to detect a continuous
dial tone. Anyone have experience doing so?
I have looked into the Goertzel algorithm, but I am unable to
understand how I determine if I've encountered a dial tone by looking
at the algorithm's output. For example:
Sampling Rate = 8000
N = 205
Frequency = 941
k = 24 and coeff = 1.4828667
Relative magnitude squared = 131986.38
Relative magnitude = 363.29929
What does that tell me? Any help is much appreciated. Does this tell
me a dial tone was detected or not? If not (as I assume), what would
the output look like if it did in fact detect a continuous dial tone?
I used the code from