LENA software divides the audio data into short segments (~1 sec). Based on patterns of frequency and pitch, the software can then code each segment as:
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Child (wearing the device),
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Adult (usually the teacher)
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Other (silence, background noise, etc)
A “turn” is counted when an adult and child respond to each other within about five seconds.
Because LENA can’t understand words, some sounds — especially in noisy rooms — could be misclassified. This is why interpreting reports alongside your real‑life observations is important.
Click the image below to see a slide show with more information about how LENA works.
