Plantronics .Audio 355
A straight plug is better when the jack is on the top or bottom of your player.
A long cable ensures more freedom of movement.
This device comfortably rests on top of your outer ears. As it doesn't block out everything from the outside world, it's preferred in places like office environments and recommended for outdoor activities.
The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.
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.
More microphones result in better sound quality and enable the device to filter out background noise.
These microphones are designed to filter out background noise from the desired sound. Especially useful in noisy environments.
The highest frequencies that the mic can pick up well. Better for recording treble.
Sennheiser Ambeo Smart Headset
The lowest frequencies that the mic can pick up well. Better for recording bass. If a microphone is going to be used for speech, a voice microphone, it must have great gain for bass, since human voice is in the low frequencies.
Sennheiser Presence UC
There is a control panel on the cable, so you can easily operate the device without having to interact with it.
The device has an option to mute/unmute a conversation directly from the device.