Has Active Noise Cancellation (Anc)
Sony WH 1000XM4
✓
Bose QuietComfort 45 ✓
Active noise cancellation uses more advanced technology to actively counter noise. How it works, it detects and analyzes the sound pattern of incoming noise and then generates a mirror signal to cancel it out. In simple terms, it's like taking +1 outside (noise from your surrounding) and adding -1 inside (counter sound within the device) to make zero hence "diluting" the noise.
Sony WH 1000XM4 allow you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise.
Bose QuietComfort 45 too have active noise cancellation making both devices ideal for plane rides and morning commutes. Each may work with different noise cancellation modes, pick the setting, mode, or noise cancellation type that suits your commute or that enhances your relaxation time.
Has Passive Noise Reduction
Sony WH 1000XM4
✓
Bose QuietComfort 45 ✓
Passive Noise Cancellation uses well-designed ear cups to seal out unwanted noise. This is used for both in-ear earphones and over-ear headphones where the headphone itself will keep surrounding noise out.
The Sony WH 1000XM4 sits tightly in place, creating an acoustic seal that reduces background noise and prevents your music from leaking out.
Both of these devices have passive noise reduction which means that also the Bose QuietComfort 45 isolates you from ambient noise instead of actively using technology to cancel it out.
Lowest Frequency
Sony WH 1000XM4
4Hz
Bose QuietComfort 45 ✗
Low-frequency response measures if and how well an audio component reproduces low audible frequencies and if it makes any changes to the signal on the way through. Sony WH 1000XM4's lowest frequency is at 4Hz, the lower the low-frequency response, the stronger and juicier the bass.
Highest Frequency
Sony WH 1000XM4
40,000Hz
Bose QuietComfort 45 ✗
High frequency response measures if and how well an audio device reproduces high audible frequencies and if it makes any changes to the signal while at it. Sony WH 1000XM4's highest frequency is at 40,000Hz, the higher the high-frequency response, the clearer and crispier the treble.
Sound Pressure Level
Sony WH 1000XM4
105dB/mW
Bose QuietComfort 45 ✗
Sound pressure is the average variation in atmospheric pressure caused by the sound, the sound level .i.e how loud something is can be perceived differently by different people so we need to have the means to get an objective measurement of sound level expressed in numerical terms.
The sound pressure level, SPL, is the pressure level of a sound, measured in decibels, dB, Sony WH 1000XM4's measurement is 105dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
Driver Unit Size
Sony WH 1000XM4
40mm
Bose QuietComfort 45 40mm
The driver unit is the component that produces sound in the device, its size dictates the loudness of the headphone. Sony WH 1000XM4 driver unit is 40mm in diameter, bigger drivers are more powerful and can produce better bass.
Bose QuietComfort 45 driver unit is 40mm in diameter,
making both Bose QuietComfort 45, and Sony WH 1000XM4 similar in how loud their sound gets
, as many tend to believe that driver units of a bigger size automatically produce better sound quality.
However, large drivers usually have difficulty reproducing high frequencies so yeah, larger drivers can generate louder sound, but this does not mean that they produce better sound.
Impedance
Sony WH 1000XM4
16Ohms
Bose QuietComfort 45 ✗
Impedance is the device's resistance to the electromagnetic current, when electricity flows through a conductor, it faces electrical resistance that counters the flow of current. The resistance of a conductor is measured in ohms. Sony WH 1000XM4's impedance is 16Ohms, the lower the impedance, the easier it is to get higher volume and requires less power.
Has A Neodymium Magnet
Sony WH 1000XM4
✓
Bose QuietComfort 45 ✗
Neodymium magnets when used in audio devices produce a higher sensitivity and substantial sound output while using less power. They can help produce music at quite a high sound pressure level, SPL, with the use of high magnetic flux. The Sony WH 1000XM4 have this type of magnet.
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