Has Active Noise Cancellation (Noise Control)
Sony WF 1000XM4
✓
Bowers & Wilkins PI7 ✓
Active noise cancellation uses advanced kind of tech to actively counter noise. How it works, it studies 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) and producing -1 (inverted noise) to make zero thus "diluting" the noise.
The Bowers & Wilkins PI7 have Active Noise Cancellation enabling you to listen at lower volume levels, good for your ears as you don't need to crank up the device volume to overcome background noise.
Sony WF 1000XM4 too have ANC which makes either of the devices ideal for plane rides and morning travels. The Bowers & Wilkins PI7 and Sony WF 1000XM4 operate with different noise cancellation modes, pick the mode that you prefer for commute or that suites your relaxation time.
Has Passive Noise Reduction
Sony WF 1000XM4
✓
Bowers & Wilkins PI7 ✓
Bowers & Wilkins PI7 sit well in place, this creates an acoustic seal that tones down your environment sounds well as preventing the device sound from leaking out .
Both Sony WF 1000XM4, and Bowers & Wilkins PI7 have passive noise reduction this means that both tone down ambient noise instead of actively using ANC to cancel it out.
Driver Unit Size
Sony WF 1000XM4
6mm
Bowers & Wilkins PI7 9.2mm
Bowers & Wilkins PI7 driver unit is 9.2mm in diameter, the bigger the unit the more powerful, therefor producing better bass.
The driver unit is basically a mini speaker that produces sound in the device, its size corellates with the sound made by the earbuds.
Sony WF 1000XM4 driver unit is 6mm in diameter,
which means that they have a smaller driver unit than that of Bowers & Wilkins PI7 by 3.2mm
, 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 yes, larger drivers are capable of generating louder sound, but this does not imply that they produce 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 inidcates how well an audio component produces low audible frequencies 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
Bowers & Wilkins PI7 produce a juicier bass than the Sony WF 1000XM4
Highest Frequency
Sony WF 1000XM4
40000Hz
Bowers & Wilkins PI7 20000Hz
The Bowers & Wilkins PI7's highest frequency is at 20000Hz, high-frequency response indicates how well an audio component makes high audible frequencies and if it changes to the signal on its way through.
Sony WF 1000XM4's highest frequency is at 40000Hz, this implies that
Sony WF 1000XM4 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.
Has A Neodymium Magnet
Sony WF 1000XM4
✓
Bowers & Wilkins PI7 ✗
The Sony WF 1000XM4 have neodymium magnets, if used in audio devices produce a higher sensitivity and substantial sound output while using less power. They can help generate music at quite a high sound pressure level, with the use of high magnetic flux.
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