QKZ DM10 – In-Ear Earphone DM 10 – Multi-Color
- Speaker: 9.2mm
- Impedance: 32Ω ± 15%
- Nominal input power: 3mW
- Maximum input power: 5mW
- Piston in-ear headphones
- Function: Play / Pause, Answer / Off
- Material: Metal Magnetic Earphone
- Speaker Sensitivity: 120 ± 2dB (at 1 KHz 1mW)
- Speaker Frequency Response: 20 -22K Hz
- Operating Temperature: 10 Celsius + 40 Celsius
- Microphone Sensitivity: 42dB ± 3dB1kHz, 3V 0dB = 1V / pa
Earphones (or headphones in the early days of telephony and radio) are a pair of small loudspeaker drivers worn on or around the head over a user’s ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby to hear. Headphones are also known as ear speakers, earphones or, colloquially, cans. Circumaural and supra-aural headphones use a band over the top of the head to hold the speakers in place. The other type, known as earbuds or earpieces consist of individual units that plug into the user’s ear canal.
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