Has Active Noise Cancellation (Noise Control)
Xiaomi Redmi Buds 4 Pro
✓
Skullcandy Indy Fuel ✗
ANC uses more advanced technology to actively cancel noise. ANC works when, it studies the sound pattern outside and inside the earbud and after inverts the soundwaves to cancel it out. Simply put, it's like taking +1 (sound from your surrounding) and adding -1 (counter sound by the device) giving 0 resulting in a reduced level of noise.
Xiaomi Redmi Buds 4 Pro have Active Noise Cancellation enabling you to listen at lower volume levels, causing less ear fatigue as you don't need to crank up the earbuds volume to overcome background noise.
Has Passive Noise Reduction
Xiaomi Redmi Buds 4 Pro
✓
Skullcandy Indy Fuel ✓
The Xiaomi Redmi Buds 4 Pro sit tightly in place, creating an acoustic covering that reduces your environment noise while preventing the earbuds voice audio from leaking out at the same.
Both Skullcandy Indy Fuel, and Xiaomi Redmi Buds 4 Pro have passive noise reduction this implies that both reduce ambient noise instead of actively using ANC to cancel it out.
Driver Unit Size
Xiaomi Redmi Buds 4 Pro
11mm
Skullcandy Indy Fuel 6mm
The Xiaomi Redmi Buds 4 Pro have a unit size of 11mm in diameter, the bigger the unit the more powerful, and can produce better bass.
The driver unit is the component that makes sound in the device, its size determines the sound made by the earbuds.
Skullcandy Indy Fuel driver unit is 6mm in diameter,
which means that they have a smaller driver unit than that of Xiaomi Redmi Buds 4 Pro by 5mm
, 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 it's true that, larger drivers are capable of generating louder sound, but this does not mean that they produce better quality sound.
Lowest Frequency
Xiaomi Redmi Buds 4 Pro
20Hz
Skullcandy Indy Fuel 20Hz
The Xiaomi Redmi Buds 4 Pro's lowest frequency is at 20Hz, low-frequency response measures if and how well a particular audio component produces low frequencies that can be heard, and if it alters the signal on its way through.
Skullcandy Indy Fuel's lowest frequency is at 20Hz, this implies that
both devices produce equal bass
Highest Frequency
Xiaomi Redmi Buds 4 Pro
40000Hz
Skullcandy Indy Fuel 20000Hz
The Xiaomi Redmi Buds 4 Pro's highest frequency is at 40000Hz, high-frequency response measures if and how well a particular audio device makes high human frequencies and if it adjustments to the signal on its way through.
Skullcandy Indy Fuel's highest frequency is at 20000Hz, this means that
Xiaomi Redmi Buds 4 Pro can generate a clearer and crispier treble than the Skullcandy Indy Fuel
Sound Pressure Level
Xiaomi Redmi Buds 4 Pro
✗
Skullcandy Indy Fuel 105dB/mW
SPL, is the level of pressure of sound, in decibels, dB, Skullcandy Indy Fuel's measurement is 105dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
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