Has Active Noise Cancellation (Noise Control)
Xiaomi Redmi Buds 4 Pro
✓
Ultimate Ears Drops ✗
ANC makes use of advanced technology to actively cancel noise. ANC works when, it detects and analyzes the sound pattern of incoming noise and generates a mirror signal to counter it. Simply put, it's like having +1 (sound from your surrounding) then adding -1 (inverted noise) giving 0 hence "diluting" the noise.
The Xiaomi Redmi Buds 4 Pro have Active Noise Cancellation allowing you to listen at lower volume levels, good for your ears as you don't have to crank up the earbuds volume to outcompete background noise.
Has Passive Noise Reduction
Xiaomi Redmi Buds 4 Pro
✓
Ultimate Ears Drops ✓
Ultimate Ears Drops sit tightly in place, this creates an acoustic covering that tones down your environment sounds while preventing the earbuds sound from leaking out .
Both Xiaomi Redmi Buds 4 Pro, and Ultimate Ears Drops have passive noise reduction which implies that both tone down 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.
A driver unit is the component that produces sound in the device, its size dictates the sound made by the device.
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
, as many tend to believe that driver units of a bigger size automatically produce better sound quality.
However, large drivers find it difficult to produce high frequencies so yes, larger drivers are capable of generating 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
Ultimate Ears Drops's lowest frequency is at 20Hz, low-frequency response measures if and how well an audio component generates low audible frequencies and if it alters 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
40000Hz
Ultimate Ears Drops 20000Hz
The Ultimate Ears Drops's highest frequency is at 20000Hz, high-frequency response tells how well a particular audio device makes high human frequencies and if it makes any changes to the signal on its way through.
Xiaomi Redmi Buds 4 Pro's highest frequency is at 40000Hz, this implies that
Xiaomi Redmi Buds 4 Pro generate 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 level of pressure 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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