If you want a lightweight, reliable on-ear option with simple physical controls for long shifts in noisy environments like construction work, choose Sony WH-CH520L; if you need immersive spatial audio, superior active noise cancellation, and Hi-Res LDAC support for critical listening or focus during downtime, choose CMF BY NOTHING Headphone Pro Active.
• Sony WH-CH520L: Strength lies in its ultra-lightweight 310g design and 50-hour battery life with quick charging; trade-off is the lack of active noise cancellation and an on-ear fit that may feel less isolating in extreme conditions. Best for users prioritizing comfort and simplicity over deep sound isolation.
• CMF BY NOTHING Headphone Pro Active: Strength is its 40 dB adaptive Active Noise Cancellation and Hi-Res LDAC audio certification; trade-off is the slightly heavier over-ear build and reliance on app-based customization rather than direct buttons. Best for audiophiles and professionals needing maximum environmental control.
The Sony WH-CH520L is engineered for those who need a headset that disappears into your routine without demanding constant attention. Its most defining characteristic is the on-ear design paired with a total weight of just 310 grams. This makes it exceptionally suitable for extended wear where pressure points are a concern. The adjustable headband and soft ear pads ensure a secure fit that doesn't dig into the temples, which is a crucial factor when you are moving around a job site or commuting for hours. If you are looking for clip on earbuds for construction work, this isn't that—it is a full headphone—but its form factor offers a unique middle ground between bulky over-ear models and insecure earbuds.
For the worker who values straightforward operation, the button layout here is a major asset. Unlike touch-only interfaces that can be finicky with gloves or sweaty hands, the Sony model relies on easy physical button operation on the ear cups. You can manage calls and volume without fumbling through menus. The built-in microphone features noise reduction to help keep conversations clear even when machinery is roaring nearby, though it does not actively cancel out that background noise digitally. It simply captures your voice while filtering some ambient interference.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-30 · 6 min read · Independent comparison
Battery anxiety is rarely a problem with this unit. With up to 50 hours of playback on a single charge, you can go days without plugging it in. A quick charge function adds significant value; a mere three-minute charge provides 1.5 hours of listening time. This is perfect for those short breaks where you grab a coffee and quickly top up before heading back to the floor. However, you should skip this model if you require absolute silence or deep immersion in music, as it lacks active noise cancellation technology. It relies on passive sound isolation from the ear cup seal, which works well but cannot match the digital silence of ANC headphones.
The CMF BY NOTHING Headphone Pro Active targets a user who demands high-fidelity audio and total control over their acoustic environment. These are over-ear headphones weighing 283 grams, utilizing memory foam earpads that conform to the shape of your ears for a plush, all-day experience. The "Pro" designation is justified by the inclusion of Adaptive Active Noise Cancellation capable of reducing up to 40 dB of ambient noise. This feature transforms the listening experience in chaotic settings, allowing you to block out the rumble of heavy equipment or the din of a busy office to focus purely on what you are hearing.
Sound quality is another pillar where this model shines. It supports LDAC, a codec that transmits three times more data than standard Bluetooth codecs, ensuring that every nuance of your music comes through with exceptional clarity. The 40mm nickel-plated dynamic drivers deliver a wide frequency response ranging from 20Hz to 40kHz, covering the entire spectrum of human hearing and beyond. If you are someone who listens to detailed orchestral pieces or crisp podcasts, the ability to customize your sound via the Nothing X app with personal sound profiles and spatial audio modes creates a personalized concert hall experience.
Connectivity is modern and robust, featuring Bluetooth 5.4 for a stable link and lower latency compared to older versions. The device also includes a 3.5mm jack for wired connections if wireless interference becomes an issue. Battery endurance is impressive, offering up to 100 hours of playback without ANC engaged, or 50 hours with it active. A five-minute charge delivers four hours of listening time, making it incredibly resilient for long shifts. While these are fantastic for general use, they might feel too bulky for some if you need to wear safety gear like hard hats underneath them, as the over-ear design covers the ears completely.
• Best for battery life with ANC on → CMF BY NOTHING Headphone Pro Active (50 hours with ANC, 100 hours without).
• Best for quick charging efficiency → CMF BY NOTHING Headphone Pro Active (5 minutes = 4 hours vs Sony's 3 minutes = 1.5 hours).
• Best for physical button reliability → Sony WH-CH520L (dedicated buttons vs CMF's mix of touch and app control).
• Best for sound fidelity and detail → CMF BY NOTHING Headphone Pro Active (Hi-Res LDAC, 40kHz range vs Sony's standard 20kHz range).
• Best for lightweight portability → Sony WH-CH520L (310g on-ear vs 283g over-ear, though CMF is lighter, the on-ear design feels less intrusive).
• Best for noise isolation in loud sites → CMF BY NOTHING Headphone Pro Active (Active Noise Cancellation vs passive isolation).
• Best for open ear headphones for construction work → Neither fits this category perfectly, but Sony's on-ear design allows for better situational awareness than the sealed CMF over-ears.
• Best for multi-device switching → Both support multipoint, but Sony emphasizes ease of pairing with Swift Pair/Fast Pair for everyday use.
If I were buying a pair of headphones specifically for construction work where I need to stay aware of my surroundings but still enjoy music during breaks, I would lean toward the Sony WH-CH520L. Its on-ear design keeps me cooler and more aware of the environment than the sealed over-ear CMF model, and the physical buttons are far more reliable when wearing gloves. However, if my priority was escaping the noise of the job site entirely to focus on training or relaxation, I would switch to the CMF BY NOTHING Headphone Pro Active for its superior noise cancellation and Hi-Res audio capabilities. Ultimately, for the specific blend of durability, comfort, and situational awareness required on a construction site, the Sony wins for me.
Both models offer distinct advantages. The Sony WH-CH520L is better suited for jobs requiring situational awareness due to its on-ear fit, while the CMF BY NOTHING Headphone Pro Active provides superior noise cancellation if you need to block out machinery completely.
The CMF BY NOTHING Headphone Pro Active lasts up to 50 hours with Active Noise Cancellation turned on, whereas the Sony WH-CH520L does not have ANC and offers up to 50 hours of standard playback.
Yes, both the Sony WH-CH520L and the CMF BY NOTHING Headphone Pro Active support Bluetooth multipoint connection, allowing you to switch seamlessly between a phone and a laptop.
Only the CMF BY NOTHING Headphone Pro Active supports Hi-Res audio via the LDAC codec and extends its frequency range up to 40kHz, while the Sony model is limited to standard Bluetooth audio performance.
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