Noise-canceling headphones excel at blocking airplane rumble compared to human voices primarily due to the predictability of low-frequency sounds. Airplane noise consists of low-frequency waves that are easier to model and cancel through phase inversion, where an opposing sound wave is generated to negate the original sound through destructive interference. This technique is effective because consistent wave patterns are simpler for the technology to analyze and counteract, often using digital signal processing[1][5].
In contrast, human speech is irregular and fast-changing, making it harder to cancel effectively. Additionally, the fit and passive isolation of headphones can impact their ability to manage midrange frequencies, with some designs performing better at this range due to their construction and speaker capabilities[6][5].
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