Measurement of insertion loss and gain in variable hear-through and noise cancellation modes of true wireless earbuds

Open Access

Figure 9

Spectrogram showing the onset of spectral modification of 80 dB SPL diffuse pink noise for Device A's HTM 5. This onset is visible from 2 to 3 s and most prominent in the frequencies either side of the 2 to 4 kHz region.

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