Earphones
The present disclosure discloses an earphone including a sound production component and a suspension structure. A first sound guiding hole and a second sound guiding hole are disposed on the sound production component, wherein the first sound guiding hole is configured to guide a first sound transmitted to an inside of an ear canal of a user; the second sound guiding hole is configured to communicate an inside of the sound production component with an outside of the sound production component and guide a second sound transmitted to a spatial position outside the sound production component. The suspension structure is configured to place the sound production component on an ear of the user and provide an opening between the sound production component and an opening of the ear canal of the user for acoustic communication with the spatial position outside the sound production component.
1 . An earphone, comprising:
a sound production component, a first sound guiding hole and a second sound guiding hole being disposed on the sound production component, wherein
the first sound guiding hole is configured to guide a first sound transmitted to an inside of an ear canal of a user; and
the second sound guiding hole is configured to communicate an inside of the sound production component with an outside of the sound production component and guide a second sound transmitted to a spatial position outside the sound production component, wherein the first sound guiding hole is located closer to the inside of the ear canal than the second sound guiding hole; and
a suspension structure configured to place the sound production component on an ear of the user and provide an opening between the sound production component and an opening of the ear canal of the user for acoustic communication with the spatial position outside the sound production component, wherein
when the earphone is in a wearing state, a centroid of a projection of the sound production component on a sagittal plane is located within a projection region of an edge of a concha cavity on the sagittal plane.
2 . The earphone of claim 1 , wherein when the earphone is in the wearing state, at least a portion of the sound production component extends into the concha cavity, and a sidewall of the sound production component on which the first sound guiding hole is disposed and the concha cavity enclose the cavity.
3 . The earphone of claim 2 , wherein a distance between the centroid of the projection of the sound production component on the sagittal plane and a projection of an edge of the concha cavity on the sagittal plane is within a range of 4 mm-25 mm.
4 . The earphone of claim 2 , wherein a ratio of a distance between the centroid of the projection of the sound production component on the sagittal plane and a highest point of a projection of an auricle of the user on the sagittal plane in a vertical axis direction to a height of the projection of the auricle on the sagittal plane in the vertical axis direction is 0.35-0.6.
5 . The earphone of claim 4 , wherein a ratio of a distance between the centroid of the projection of the sound production component on the sagittal plane and an end point of the projection of the auricle on the sagittal plane in a sagittal axis direction to a width of the projection of the auricle on the sagittal plane is 0.4-0.65.
6 . The earphone of claim 2 , wherein an overlap ratio between an area of the projection of the sound production component on the sagittal plane and an area of a projection of the concha cavity on the sagittal plane is greater than or equal to ⅓.
7 . The earphone of claim 2 , wherein when the earphone is in the wearing state, an inclination angle of a projection of an upper side or a lower side of the sound production component on the sagittal plane relative to a horizontal direction is within a range of 10°-28°.
8 . The earphone of claim 2 , wherein when the earphone is in the wearing state, a distance between a midpoint of a projection of an upper side of the sound production component on the sagittal plane and a projection of a vertex of the suspension structure on the sagittal plane is within a range of 17 mm-36 mm.
9 . The earphone of claim 1 , wherein when the earphone is in a wearing state, the sound production component includes a body and a baffle extending toward the opening of the ear canal of the user, and the baffle and the ear enclose a cavity having the opening between the sound production component and the opening of the ear canal of the user.
10 . The earphone of claim 9 , wherein the first sound guiding hole is located inside the cavity, and the second sound guiding hole is located outside the cavity.
11 . The earphone of claim 1 , wherein within any one of 3.5 kHz-4.5 kHz, 2.5 KHz-3.5 kHz, and 1.5 kHz-2.5 kHz, a ratio of a sound pressure at the first sound guiding hole to a sound pressure at the second sound guiding hole is within a range of 0.7-1.5.
12 . The earphone of claim 1 , wherein an acoustic resistance mesh is disposed at the first sound guiding hole or the second sound guiding hole, the acoustic resistance mesh including a gauze mesh or a steel mesh.
13 . The earphone of claim 12 , wherein a mesh count of the acoustic resistance mesh is within a range of 60-100.
14 . The earphone of claim 1 , wherein the sound production component comprises:
a transducer including a diaphragm configured to produce sound in response to an excitation signal; and
a housing, the housing forming an accommodation cavity for accommodating the transducer, wherein the diaphragm divides the accommodation cavity into a front cavity and a rear cavity corresponding to a front side and a rear side of the diaphragm, respectively, the front cavity is in acoustic communication with the first sound guiding hole, and the rear cavity is in acoustic communication with the second sound guiding hole, wherein an acoustic structure of the front cavity or an acoustic structure of the rear cavity is configured such that a phase difference between the first sound and the second sound is smaller than 180°.
15 . The earphone of claim 14 , wherein at 1000 Hz, the phase difference between the first sound and the second sound is 125°-178°.
16 . The earphone of claim 14 , wherein at 2000 Hz, the phase difference between the first sound and the second sound is 170°-175°.
17 . The earphone of claim 14 , wherein a ratio of an opening area of the second sound guiding hole to an area of the diaphragm is within a range of 0.1-0.4.
18 . The earphone of claim 14 , wherein
the sound production component further includes an acoustic structure disposed in the front cavity and/or the rear cavity, the acoustic structure is configured to adjust a phase of the first sound and/or the second sound to adjust the phase difference between the first sound and the second sound; and
the acoustic structure includes at least one baffle, one end of each baffle is connected to an inner wall of the rear cavity or the front cavity, and the other end of the each baffle is a free end.
19 . The earphone of claim 14 , wherein the sound production component further includes an expansion acoustic structure disposed in the front cavity and/or the rear cavity, the expansion acoustic structure is configured to change cross-sectional areas of the front cavity or the rear cavity at different positions on a sound transmission path, and the expansion acoustic structure includes an expansion cavity.
20 . The earphone of claim 14 , wherein the sound production component further includes a sound-absorbing structure disposed in the front cavity and/or the rear cavity, the sound-absorbing structure includes a Helmholtz resonance cavity, a micro-perforated plate resonator, or a quarter wavelength tube resonator, and a resonance frequency of the sound-absorbing structure is within a range of 1000 Hz-3000 Hz.