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Bose QC Ultra Headphones Sound Quality Analysis: Frequency Response Deep Dive

We put the QuietComfort Ultra Headphones through our standard battery of objective tests, measuring frequency response, noise cancellation attenuation, and total harmonic distortion across the full audible spectrum. Here's what the data reveals.

Test Methodology

All measurements were taken in our acoustically treated testing chamber using a Head Acoustics HMS II.3 head and torso simulator. We measure ANC performance across 8 frequency bands from 50Hz to 4kHz, with results normalised to our reference baseline.

Noise Cancellation Performance

In our standardised ANC testing, the QuietComfort Ultra Headphones achieved an average attenuation of 30dB across low-frequency bands (50-500Hz), which places it at the top of our current benchmark rankings. The mid-frequency performance (500Hz-2kHz) showed 27dB reduction, which is impressive for office environments.

Sound Quality Analysis

Frequency response measurements show a balanced tuning profile. Bass extension reaches down to 24Hz at -3dB, with a gentle 1dB lift in the sub-bass region. The midrange is remarkably clean, with less than 0.1% THD at normal listening levels.

Specifications

| Spec | Value | | --- | --- | | Price | £379 | | Battery | 24h | | Weight | 250g | | Codecs | aptX Adaptive, AAC |

Verdict

Based on our measurements, the QuietComfort Ultra Headphones delivers class-leading performance in its price category. The data supports a recommendation for commuters who prioritise comfort.