ANC Headphone Acoustic Lab & Value Benchmark

Acoustic Frequency Attenuation Lab Audio Standby

1. Select Ambient Noise Scene

2. Headphone ANC Filter Model

Master Vol: 50%

Attenuated Frequency Spectrum (20 Hz - 20 kHz) -28.5 dB avg

Sony XM4C (Leaked)

Bose QC Ultra

Sennheiser M4

Sony XM4 (Classic)

Ambient Profile

Acoustic Isolation:

78%

Multi-Criteria Value Matrix TechRadar Spec Weighing

ANC Isolation: 35%

Battery Runtime: 20%

Audio Codec / Hi-Res: 20%

Comfort & Foldability: 15%

Price / MSRP Sensitivity: 10%

Model	ANC (dB)	Battery	Codecs	MSRP	Value Index

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• Sony WH-1000XM4C (Leaked): Re-engineers classic XM4 foldability with upgraded V2 dual-feedback ANC and competitive $348 MSRP.

• Bose QC Ultra: Supreme low-frequency attenuation (up to -34 dB), but carries a premium $429 price tag and 24h battery.

• Sennheiser Momentum 4: Unmatched 60-hour endurance and audiophile aptX Adaptive, but weaker low-end acoustic seal.