Portable sound equipment
A portable sound equipment including a housing having an audio hole; an inner microphone collecting a sound through the audio hole; an audio output unit having a frame securing a speaker in which a ventilation hole is formed in the frame allowing outside air to pass through the audio output unit, and a mesh covering the ventilation hole and having a density sufficient to reduce an amount of the outside air passing through the audio output unit; and a controller processing the sound collected by the inner microphone.
1. A portable sound equipment, comprising:
a housing having an audio hole formed in one side;
an audio output unit outputting a sound through the audio hole;
an inner microphone collecting a sound through the audio hole; and
a controller installed in the housing, the controller configured to control the audio output unit to output the sound and process the sound collected by the inner microphone,
the audio output unit, comprising:
a frame;
a vibration plate located at one side of the frame;
an audio coil located within the frame;
a signal line connecting the audio coil and the controller to each other;
a permanent magnet generating a magnetic field around the audio coil;
an airing hole located in the other side of the frame so as to connect an inside and an outside of the frame to each other and allow outside air to pass through the audio output unit;
a first cap covering the other side of the frame;
a cable hole formed in the first cap so as to let the signal line to pass therethrough;
a sealing part sealing a space between the cable hole and the signal line;
a back hole formed in the first cap; and
a mesh located at the back hole.
2. The portable sound equipment of claim 1 , wherein a size of the back hole is smaller than that of the airing hole.
3. The portable sound equipment of claim 1 , wherein the mesh comprises fabric.
4. The portable sound equipment of claim 1 , wherein a cutoff performance of a sound flowing in through the mesh is equal to or greater than 30 dB on 500 Hz band.
5. The portable sound equipment of claim 1 , wherein the audio hole is located at an end portion of an audio passage projected from one side of the housing and further comprises a partition dividing the audio passage into a first audio passage connected to the audio output unit and a second audio passage connected to the inner microphone.
6. The portable sound equipment of claim 5 , wherein the first audio passage is larger than the second audio passage.
7. The portable sound equipment of claim 1 , further comprising:
at least one outer microphone located at the other side of the housing,
wherein the controller distinguishes a user's voice and an external noise from each other using a difference between the sound collected by the inner microphone and the sound collected by the outer microphone.
8. The portable sound equipment of claim 1 , wherein the audio output unit further comprises:
a second cap located at one side of the vibration plate, the second cap comprising a front hole through which a sound output from the vibration plate is output.