Has Active Noise Cancellation (Noise Control)
Audio Technica ATH TWX9
✓
Sennheiser CX 500BT ✓
Active noise cancellation uses advanced technology to actively cancel noise. How it works, it studies the sound pattern of incoming noise and after inverts the soundwaves to counter it. In simple terms, it's like taking +1 (sound from your surrounding) and producing -1 (inverted noise) to make 0 hence "diluting" the noise.
Audio Technica ATH TWX9 have ANC allowing you to listen at lower volume levels, causing less ear fatigue since you don't have to crank up the earbuds volume to outcompete background sounds.
The Sennheiser CX 500BT too have ANC making either of the earbuds ideal for plane rides and rush hour commutes. The Audio Technica ATH TWX9 and Sennheiser CX 500BT operate with different noise cancellation types, pick the noise cancellation type that you prefer for commute or that suites your chill time.
Has Passive Noise Reduction
Audio Technica ATH TWX9
✓
Sennheiser CX 500BT ✓
Audio Technica ATH TWX9 sit tightly in place, this creates a sound seal that reduces your environment sounds and also prevents the earbuds voice audio from leaking out at the same.
Both of these devices have passive noise reduction which implies that they tone down ambient noise instead of actively using ANC to cancel it out.
Driver Unit Size
Audio Technica ATH TWX9
5.8mm
Sennheiser CX 500BT ✗
The Audio Technica ATH TWX9 driver unit is 5.8mm in diameter, bigger drivers are more powerful, and can produce better bass.
The driver unit is basically a mini speaker that produces sound in the earbuds, its size corellates with the sound made by the device.
Lowest Frequency
Audio Technica ATH TWX9
20Hz
Sennheiser CX 500BT 5Hz
The Audio Technica ATH TWX9's lowest frequency is at 20Hz, low-frequency response measures if and how well a particular audio component generates low frequencies that can be heard, and if it alters the signal while at it.
Sennheiser CX 500BT's lowest frequency is at 5Hz, this means that
Sennheiser CX 500BT make sound with a juicier bass than the Audio Technica ATH TWX9
Highest Frequency
Audio Technica ATH TWX9
40000Hz
Sennheiser CX 500BT 21000Hz
The Audio Technica ATH TWX9's highest frequency is at 40000Hz, high-frequency response measures if and how well an audio device makes high recognizable frequencies and if it changes to the signal on its way through.
Sennheiser CX 500BT's highest frequency is at 21000Hz, this implies that
Audio Technica ATH TWX9 can produce a clearer and crispier treble than the Sennheiser CX 500BT
Sound Pressure Level
Audio Technica ATH TWX9
102dB/mW
Sennheiser CX 500BT 94dB/mW
The sound pressure level, is the pressure level of sound, measured in decibels, dB, Audio Technica ATH TWX9's measurement is 102dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
Sennheiser CX 500BT's sound pressure level measurement is 94dB/mW. The sound pressure level, something is can be considered differently by different people, so we need to have a way of getting an objective measurement of sound level expressed in numerical terms.
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