Has Active Noise Cancellation (Noise Control)
Xiaomi Redmi Buds 4 Pro
✓
Ultimate Ears Drops ✗
ANC uses advanced kind of tech to reduce unwanted ambient sounds. ANC works when, it detects and analyzes the sound pattern outside and inside the earbud and generates a mirror signal to cancel it out. In simple terms, it's like having +1 (noise) then adding -1 (inverted noise) giving 0 which results in a reduced level of noise.
The Xiaomi Redmi Buds 4 Pro have Active Noise Cancellation allowing you to listen at lower volume levels, causing less ear fatigue since you don't have to crank up the earbuds volume to overcome background noise.
Has Passive Noise Reduction
Xiaomi Redmi Buds 4 Pro
✓
Ultimate Ears Drops ✓
Ultimate Ears Drops sit tightly in place, creating an acoustic covering that tones down your environment sounds and also prevents the earbuds voice audio from leaking out .
Both Xiaomi Redmi Buds 4 Pro, and Ultimate Ears Drops have passive noise reduction which means that both limit ambient noise instead of actively using ANC to cancel it out.
Driver Unit Size
Xiaomi Redmi Buds 4 Pro
11mm
Ultimate Ears Drops 9.2mm
The Ultimate Ears Drops have a unit size of 9.2mm in diameter, the bigger the unit the more powerful, and can produce better bass.
The driver unit is the component that produces sound in the device, the unit size corellates with the loudness of the earbuds.
Xiaomi Redmi Buds 4 Pro driver unit is 11mm in diameter,
making them have a larger driver unit than that of Ultimate Ears Drops by 1.8mm
, many people have a misconception that driver units of a bigger size automatically produce better sound quality.
However, large drivers usually have difficulty producing high frequencies so yeah, larger drivers can generate louder sound, but this does not imply that they deliver better quality sound.
Lowest Frequency
Xiaomi Redmi Buds 4 Pro
20hz
Ultimate Ears Drops 20hz
The Ultimate Ears Drops's lowest frequency is at 20Hz, low-frequency response inidcates how well a particular audio device produces low frequencies that can be heard, and if it makes any changes to the signal while at it.
Xiaomi Redmi Buds 4 Pro's lowest frequency is at 20Hz, this means that
both devices can produce equal bass
Highest Frequency
Xiaomi Redmi Buds 4 Pro
40,000hz
Ultimate Ears Drops 20,000hz
Ultimate Ears Drops's highest frequency is at 20,000Hz, high-frequency response indicates how well an audio device produces high human frequencies and if it makes any changes to the signal while at it.
Xiaomi Redmi Buds 4 Pro's highest frequency is at 40,000Hz, this means that
Xiaomi Redmi Buds 4 Pro produce a clearer and crispier treble than the Ultimate Ears Drops
Sound Pressure Level
Xiaomi Redmi Buds 4 Pro
✗
Ultimate Ears Drops 110db/mw
SPL, is the pressure level of sound, in decibels, dB, Ultimate Ears Drops's measurement is 110dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
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