Has Active Noise Cancellation (Noise Control)
Sony WF 1000XM4
✓
Bowers & Wilkins PI7 ✓
Active noise cancellation makes use of advanced kind of tech to reduce ambient sounds. How it works, 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 taking +1 (noise) and producing -1 (inverted noise) to make 0 which results in a reduced level of noise.
The Bowers & Wilkins PI7 have Active Noise Cancellation enabling you to listen at lower levels of volume, 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 making either of the devices ideal for plane rides and rush hour travels. Each work with different noise cancellation modes, pick the mode that suits your commute or that enhances your relaxation time.
Has Passive Noise Reduction
Sony WF 1000XM4
✓
Bowers & Wilkins PI7 ✓
Bowers & Wilkins PI7 stay tightly in place, creating an acoustic covering that tones down your environment noise and also prevents the earbuds voice audio from leaking out at the same.
Both Sony WF 1000XM4, and Bowers & Wilkins PI7 have passive noise reduction this means that both tone down ambient noise without using ANC to cancel it out.
Driver Unit Size
Sony WF 1000XM4
6mm
Bowers & Wilkins PI7 9.2mm
Bowers & Wilkins PI7 have a unit size of 9.2mm in diameter, bigger drivers are more powerful, therefor producing better bass.
A driver unit is basically a mini speaker that produces sound in the earbuds, its size dictates 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 Bowers & Wilkins PI7 by 3.2mm
, 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 yeah, larger drivers can generate louder sound, but this does not mean that they deliver better quality sound.
Lowest Frequency
Sony WF 1000XM4
20Hz
Bowers & Wilkins PI7 10Hz
The Bowers & Wilkins PI7's lowest frequency is at 10Hz, low-frequency response measures if and how well a particular audio component produces low recognizable frequencies and if it alters the signal on its way through.
Sony WF 1000XM4's lowest frequency is at 20Hz, this means that
Bowers & Wilkins PI7 can produce a juicier bass than the Sony WF 1000XM4
Highest Frequency
Sony WF 1000XM4
40,000Hz
Bowers & Wilkins PI7 20,000Hz
Bowers & Wilkins PI7's highest frequency is at 20,000Hz, high-frequency response tells how well an audio device makes high human frequencies and if it adjustments to the signal while at it.
Sony WF 1000XM4's highest frequency is at 40,000Hz, this implies that
Sony WF 1000XM4 can produce a clearer and crispier treble than the Bowers & Wilkins PI7
Sound Pressure Level
Sony WF 1000XM4
105dB/mW
Bowers & Wilkins PI7 ✗
SPL, is the pressure level of sound, 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.
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