Active noise reduction earphone
The present disclosure relates to the technical field of earphone and provides to an active noise reduction earphone. The active noise reduction earphone includes an earphone shell, a speaker, a sound outlet mouth, a first feedback digital microphone, a second feedback digital microphone and a sound collecting channel. Herein, the speaker divides the earphone shell into the front speaker cavity and the back speaker cavity; the sound outlet mouth is arranged to be faced to the speaker to output the sound emitted by the speaker; the first feedback digital microphone is arranged at the first noise reduction sound collecting hole preset in the back speaker cavity to collect external ambient noise; the sound in the ear canal is collected through the sound collecting channel, and the second feedback digital microphone isolates the sound collecting channel from the front speaker cavity.
1. An active noise reduction earphone, comprising
an earphone shell;
a speaker, dividing the earphone shell into a front speaker cavity and a back speaker cavity;
a sound outlet mouth, formed in the front speaker cavity and arranged to be faced to the speaker to output sound emitted by the speaker;
a first feedback digital microphone, arranged at a first noise reduction sound collecting hole preset in the back speaker cavity to collect external ambient noise;
a second feedback digital microphone, arranged in the front speaker cavity and fixed inside the earphone shell;
a sound collecting channel, connected to a sound inlet of the second feedback digital microphone, and configured to collect the sound in an ear canal and transmit the collected sound to the sound inlet of the second feedback digital microphone;
wherein a mouth of the sound outlet mouth is provided with a filter screen, and the filter screen is configured to adjust the sound emitted by the speaker; the filter screen is provided with a mesh with an aperture same as an aperture of the sound collecting tube to allow the sound collecting tube to pass through the filter screen.
2. The active noise reduction earphone according to claim 1 , wherein the first feedback digital microphone and the second feedback digital microphone are arranged opposite to each other; and/or
a sound inlet of the first feedback digital microphone and the sound inlet of the second feedback digital microphone are arranged to be faced away from each other.
3. The active noise reduction earphone according to claim 1 , wherein the sound collecting channel is arranged in the sound outlet mouth.
4. The active noise reduction earphone according to claim 3 , wherein there is a first distance between the sound collecting channel and an inner wall of the sound outlet mouth.
5. The active noise reduction earphone according to claim 3 , wherein the sound collecting channel is a sound collecting tube; the sound collecting tube is flush with the sound outlet mouth, or
a length of the sound collecting tube is greater than a length of the sound outlet mouth and is shorter than a protruding length of the earphone shell of the earphone.
6. The active noise reduction earphone according to claim 5 , wherein the sound outlet mouth is further provided with a soft rubber earplug, and the length of the sound collecting tube is shorter than a protruding length of the soft rubber earplug.
7. The active noise reduction earphone according to claim 1 , wherein a center of the first noise reduction sound collecting hole is aligned with a center of the sound inlet of the first feedback digital microphone.
8. The active noise reduction earphone according to claim 1 , further comprising
a call analog microphone, arranged in the back speaker cavity;
a call reference analog microphone, arranged at a second noise reduction sound collecting hole preset in the back speaker cavity;
wherein a sound collecting direction of the call reference analog microphone is perpendicular to a sound collecting direction of the call analog microphone.
9. An active noise reduction earphone, comprising
an earphone shell;
a speaker, dividing the earphone shell into a front speaker cavity and a back speaker cavity;
a sound outlet mouth, formed in the front speaker cavity and arranged to be faced to the speaker to output sound emitted by the speaker;
a first feedback digital microphone, arranged at a first noise reduction sound collecting hole preset in the back speaker cavity to collect external ambient noise;
a second feedback digital microphone, arranged in the front speaker cavity and fixed inside the earphone shell;
a sound collecting channel, connected to a sound inlet of the second feedback digital microphone, and configured to collect the sound in an ear canal and transmit the collected sound to the sound inlet of the second feedback digital microphone;
a call analog microphone, arranged in the back speaker cavity;
a call reference analog microphone, arranged at a second noise reduction sound collecting hole preset in the back speaker cavity;
wherein a sound collecting direction of the call reference analog microphone is perpendicular to a sound collecting direction of the call analog microphone.
10. The active noise reduction earphone according to claim 9 , wherein the first feedback digital microphone and the second feedback digital microphone are arranged opposite to each other; and/or
a sound inlet of the first feedback digital microphone and the sound inlet of the second feedback digital microphone are arranged to be faced away from each other.
11. The active noise reduction earphone according to claim 9 , wherein the sound collecting channel is arranged in the sound outlet mouth.
12. The active noise reduction earphone according to claim 11 , wherein there is a first distance between the sound collecting channel and an inner wall of the sound outlet mouth.
13. The active noise reduction earphone according to claim 11 , wherein the sound collecting channel is a sound collecting tube; the sound collecting tube is flush with the sound outlet mouth, or
a length of the sound collecting tube is greater than a length of the sound outlet mouth and is shorter than a protruding length of the earphone shell of the earphone.
14. The active noise reduction earphone according to claim 13 , wherein the sound outlet mouth is further provided with a soft rubber earplug, and the length of the sound collecting tube is shorter than a protruding length of the soft rubber earplug.
15. The active noise reduction earphone according to claim 9 , wherein a mouth of the sound outlet mouth is provided with a filter screen, and the filter screen is configured to adjust the sound emitted by the speaker.
16. The active noise reduction earphone according to claim 9 , wherein a center of the first noise reduction sound collecting hole is aligned with a center of the sound inlet of the first feedback digital microphone.