IN-EAR HEADPHONE Russian patent published in 2019 - IPC H04R1/10 

FIELD: physics.

SUBSTANCE: invention relates to acoustics, in particular to in-ear headphones. In-ear headphone contains at least three electroacoustic transducers installed in the housing, the housing is configured to be located in the external auditory canal. Front part of the housing is located in the area of the second turn of the external auditory canal. First electro-acoustic transducer is installed in the front of the housing, the remaining electro-acoustic transducers are installed along the length of the housing. Outputs of the above-mentioned electroacoustic transducers are introduced into a common acoustic channel, the output of which is located in front of the housing. Electro-acoustic transducers are located in the above-mentioned common acoustic channel, and the front part of the housing is equipped with a flexible sealing nozzle. Each of electroacoustic transducers is made in the form of transducers with a balanced anchor. Acoustic axis of the said common acoustic channel is located, during the operation of the earpiece, approximately perpendicular to the eardrum. Flexible sealing nozzle is turned upwards relative to the axis of the housing at an angle of 5–20° and made of silicone.

EFFECT: technical results are improving manufacturability, simplifying the design, reducing nonlinear distortion, reducing the size of the earpiece, ensuring high sound quality, reducing longitudinal low-frequency resonances.

9 cl, 4 dwg