Has Active Noise Cancellation (Noise Control)
Sony WF 1000XM4
✓
Xiaomi Redmi Buds 4 Pro ✓
Active noise cancellation uses more advanced technology to reduce unwanted ambient sounds. How it works, it listens to the sound pattern of incoming noise and after inverts the soundwaves to cancel it out. In simple terms, it's like having +1 (noise) and producing -1 (inverted noise) to make zero resulting in a reduced level of noise.
Xiaomi Redmi Buds 4 Pro have Active Noise Cancellation allowing you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the earbuds volume to outcompete background noise.
The Sony WF 1000XM4 too have Active Noise Cancellation which makes both devices ideal for plane rides and morning travels. The Xiaomi Redmi Buds 4 Pro and Sony WF 1000XM4 work with different noise cancellation modes, pick the setting that you prefer for commute or that suites your relaxation time.
Has Passive Noise Reduction
Sony WF 1000XM4
✓
Xiaomi Redmi Buds 4 Pro ✓
Xiaomi Redmi Buds 4 Pro sit well in place, this creates an acoustic seal that reduces your environment noise well as preventing the earbuds music from leaking out at the same.
Both of these devices have passive noise reduction which means that both reduce ambient noise without using technology to cancel it out.
Driver Unit Size
Sony WF 1000XM4
6mm
Xiaomi Redmi Buds 4 Pro 11mm
The Xiaomi Redmi Buds 4 Pro have a unit size of 11mm in diameter, bigger drivers are more powerful, therefor producing better bass.
A driver unit is basically a mini speaker that makes sound in the device, its size corellates with the loudness of the earbuds.
Sony WF 1000XM4 driver unit is 6mm in diameter,
which implies that they have a smaller driver unit than that of Xiaomi Redmi Buds 4 Pro by 5mm
, a common assumption that driver units of a bigger size automatically produce better sound quality.
However, large drivers find it difficult to produce high frequencies so it's true that, larger drivers are capable of generating louder sound, but this does not indicate that they produce better quality sound.
Lowest Frequency
Sony WF 1000XM4
20Hz
Xiaomi Redmi Buds 4 Pro 20Hz
The Xiaomi Redmi Buds 4 Pro's lowest frequency is at 20Hz, low-frequency response measures if and how well an audio component produces low frequencies that can be heard, and if it makes any changes to the signal on its way through.
Sony WF 1000XM4's lowest frequency is at 20Hz, this means that
both devices can make sound with equal bass
Highest Frequency
Sony WF 1000XM4
40000Hz
Xiaomi Redmi Buds 4 Pro 40000Hz
The Xiaomi Redmi Buds 4 Pro's highest frequency is at 40000Hz, high-frequency response shows how well an audio component generates high audible frequencies and if it changes to the signal on its way through.
Sony WF 1000XM4's highest frequency is at 40000Hz, this means that
both devices produce equal treble
Sound Pressure Level
Sony WF 1000XM4
105dB/mW
Xiaomi Redmi Buds 4 Pro ✗
The sound pressure level, is the level of pressure of sound, measured in decibels, dB, Sony WF 1000XM4's measurement is 105dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
Has A Neodymium Magnet
Sony WF 1000XM4
✓
Xiaomi Redmi Buds 4 Pro ✗
Sony WF 1000XM4 have neodymium magnets, if used in earbuds produce a higher sensitivity and substantial sound output using less power to do so. They can help generate music at quite a high sound pressure level, using high magnetic flux.
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