6. Determining Authenticity of Test Recordings: Analysing Patterns Between Test Recordings and Actual Recordings
Upon obtaining the visualisation of both Actual and Test Recordings, we will now be able to examine the authenticity of the Test Recordings.
By inspecting the Frequency of all Actual Recordings, we can see that all samples, for both song and call Vocalization Type, tend to deviate between 3kHz to 6kHz.
Based on this information, we will attempt to determine the authenticity of the Test Recordings by analysing their wave patterns and to cross reference the analysed patterns against those of the Actual Recordings.
Comparing Actual Green Song and Call With Test Green Recordings
When comparing all Green Songs against the Green Test Recordings, we can see that none of the Green Test Recordings seem to exhibit the same patterns as those of the Actual Recordings. The Test Recordings exhibits an approximate frequency range of 0kHz to 6kHz, 3kHz to 4kHz, 3kHz to 11kHz and 0kHz to 7kHz for Test Green 1, Test Green 6, Test Green 11 and Test Green 15. Test Green 1 and Test Green 6 seem to exhibit periodic vocalization of phrases, whereas Test Green 11 and Test Green 15 tend to produce a sequence of phrases.
Comparing Actual Red Song With Test Red Recordings
Out of all Test Red Recordings, we can see that Test Red 2 and Test Red 9 seem to show similar patterns as Red Song 1: 162564 and to a lesser extent, Red Song 2: 138985, where both exhibited a frequency range between 3kHz to 6kHz, with tandem repeats of what seems like a single phrase-type. Therefore it is possible that these two recordings are authentic.
However, the rest of the Test Recordings do not exhibit the same frequency as the Actual Recordings.
Comparing Actual Red Call With Test Red Recordings
In this case, when comparing with Call Recordings, which tend to be periodic vocalization instead of a sequence of notes or phrases, we can see that Test Red 3, Test Red 4 and Test Red 13 could potentially be authentic as well as they do show similar patterns when compared to the Call Recordings.
Comparing Actual Purple Song and Call With Test Purple Recordings
By examining the Test Purple Recordings, it seems that none of the recordings show a similar pattern to our Actual Recordings. Even though Test Purple 8 seems to show a frequency range between 3kHz to 6kHz just as the actual ones do, the sequence of notes displayed is irregular, which is unlike those of the Actual Recordings. Furthermore, the other Test Purple Recordings do not fall within the 3kHz to 6kHz frequency range.
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