The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.
The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
4.has active noise-canceling (noise control)
This type of device allows 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. Ideal for plane rides and morning commutes.
The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.