TWI393455B - Acoustic core module and multimedia device - Google Patents

Description

Sound module and multimedia device

The invention relates to a sounding module, in particular to a sounding module applied in a multimedia mobile phone.

Figure 1 is a conventional sounding module 100. A housing layer 110 includes a cavity and is provided with a speaker 120 that separates the cavity into a front resonant cavity 102 and a rear resonant cavity 104. The front resonant cavity 102 is provided with a sound hole 106 communicating with the outside, facing the front side of the speaker 120. The rear resonant cavity 104 is substantially a closed space.

The first figure is presented in the form of a sectional view. In fact, the sounding module may be a cubic cylinder, and the sound hole 106 may be a circular hole. In order to improve the sound quality as well as the low frequency volume, the space of the rear cavity 104 is conventionally larger as possible. In addition, in general, two sounding modules 100 are arranged on the multimedia mobile phone, and each is responsible for playing the left channel and the right channel. To form a stereo sound field, the distance between the two sound modules 100 must be far enough. However, the design requirements of the multimedia mobile phone are light and short, so the space of the rear resonant cavity 104 may not be too large, and the distance between the left and right channels may not be too far, and it is difficult to achieve the above-mentioned sound quality and sound field requirements.

The invention provides an improved structure sounding module. In the cavity in a shell layer, a speaker is disposed to partition the cavity into a first resonant cavity and a second resonant cavity, each having an opening. The first resonance tube is disposed at the opening of the first resonant cavity, facing the front of the speaker, and the second resonant tube is disposed at the opening of the second resonant cavity, facing the back of the speaker.

The caliber and length of the first resonance tube and the second resonance tube are adjustable. The diameter and length of the first resonance tube are smaller than the inner diameter and length of the first resonant cavity. Similarly, the diameter and length of the second resonance tube are smaller than the inner diameter and length of the second resonant cavity.

When the speaker receives an audio signal to generate sound, the first resonant cavity, the second resonant cavity, the first resonant tube and the second resonant tube generate resonance and phase difference of different frequencies according to respective calibers and lengths. .

The first resonant cavity and the second resonant cavity may be hollow square cylinders. And the first resonance tube and the second resonance tube may be hollow cylinders.

Another embodiment of the present invention is a multimedia device including a first sounding module disposed toward a first direction and a second sounding module disposed toward a second direction. The structure of the first sounding module and the second sounding module are the same as those of the sounding module described in the first embodiment.

When the multimedia device plays a stereo audio, the first utterance module plays a left channel, the second utterance module plays a right channel, and the first vocal module and the first vocal module have a first cavity , the second resonant cavity, the first resonance tube And the second resonance tube generates resonance and phase difference of different frequencies according to respective calibers and lengths. The first direction and the second direction may be opposite directions that are one hundred and eighty degrees apart.

The multimedia device can be a mobile phone that includes a screen to display a picture.

The following examples specifically illustrate how the invention can be carried out in a preferred manner. The examples are for illustrative purposes only, and are not intended to limit the scope of the invention. The actual scope is subject to the scope of the patent application.

The invention provides a front and rear resonant cavity and a front and rear resonance tube in the sounding module to increase the sounding efficiency. At the same time, using the Dipole principle and the algorithm, it provides a more effective mechanism layout and a wide sound quality.

FIG. 2 is a sound emitting module 200 according to an embodiment of the present invention, and is presented in a sectional view. In the cavity of an outer casing layer 110, a speaker 120 is disposed, and the cavity in the outer casing layer 110 is partitioned into a first resonant cavity 202 and a second resonant cavity 204, each having an opening. In other words, the second resonant cavity 204 of the present invention is no longer a closed space with respect to the rear resonant cavity 104 of FIG. The outer shell layer 110 may be made of plastic, metal or wood. The speaker 120 basically belongs to the prior art and includes a diaphragm and a coil (not shown) that can receive current and vibrate. A feature of the present invention is that the configuration of the first resonance tube 210 and the second resonance tube 220 is increased. The first resonance tube 210 The second resonant tube 220 is disposed at the opening of the first resonant cavity 202, and the second resonant tube 220 is disposed at the opening of the second resonant cavity 204, facing the back of the speaker 120. Compared with Fig. 1, the present invention replaces the position of the sound hole 106 in the conventional sound module 100 with the resonance tube 210.

The speaker 120 receives an audio source signal and vibrates to emit a sound. When the speaker 120 emits a sound, the first resonant cavity 202, the second resonant cavity 204, the first resonant tube 210, and the second resonant tube 220 can generate resonances of different frequencies, so that the sounding efficiency of the sound emitting module 200 is improved. In addition, the first resonant cavity 202 and the second resonant cavity 204 can create a phase difference to improve the directivity of the sound, and the stereoscopic effect can be improved when playing stereo.

In order to generate resonance at different frequencies, the caliber and length of the first resonance tube 210 and the second resonance tube 220 can be appropriately adjusted according to experiments. In order to accommodate the first resonance tube 210 in the first resonant cavity 202, the diameter and length of the first resonance tube 210 must be smaller than the inner diameter and length of the first resonant cavity 202. Similarly, the diameter and length of the second resonance tube 220 are smaller than the inner diameter and length of the second resonant cavity 204. The data of these sizes directly affects the frequency distribution and phase difference of the resonance sound. Since the last transmitted sound is the result of a frequency addition, the size ratio of the first resonance tube 210 and the second resonance tube 220 has a direct and significant influence on the sound quality.

Based on the above principle, the present invention does not limit the size ratio, shape and material of the first resonant cavity 202 and the second resonant cavity 204, the first resonant tube 210 and the second resonant tube 220. For example, the first resonant cavity 202 and the second resonant cavity 204 may be hollow square cylinders, and the first resonant tube 210 and the second resonant tube 220 may be hollow cylinders.

Figure 3 is a multimedia device 300 according to one embodiment of the present invention. The sounding module 200 of the present invention is particularly suitable for portable mobile devices, such as mobile phones or personal digital assistants, because it enhances sound quality and directivity without increasing the volume. As shown in FIG. 3, a screen 330 is disposed in the middle of a multimedia device 300 for displaying a picture. A first sounding module 310 and a second sounding module 320 are respectively disposed on both sides of the body, and have the same structure as shown in FIG. It is assumed that the first utterance module 310 is exclusively used to play the left channel, and the second utterance module 320 is used to play the right channel, and the size ratio relationship between the first resonance tube 210 and the second resonance tube 220 can be adjusted. The first utterance module 310 emits a directional sound to the left side, and the second utterance module 320 emits a directional sound to the right side.

Based on the above principle, the shape and arrangement position of the first sounding module 310 and the second sounding module 320 are not limited to those shown in FIG. The pointing directions of the first sounding module 310 and the second sounding module 320 may be opposite directions of one hundred and eighty degrees, or may be clipped at an angle. In fact, the principle of sound pointing can refer to Helmholtz and Dipole theory. The invention The proposed sound module 200 can be combined with a digital signal processor to generate a sound signal of a specific frequency to achieve an optimized sound quality effect.

While the invention has been described above by way of a preferred embodiment, it is understood that the scope of the invention is not necessarily limited. In contrast, any modifications that are obvious to those skilled in the art or to those skilled in the art are within the scope of the invention. Therefore, the scope of patent claims must be interpreted in the broadest sense.

100‧‧‧ Sound Module

102‧‧‧ front cavity

104‧‧‧ rear cavity

106‧‧‧ sound hole

110‧‧‧Sheath

120‧‧‧Speakers

200‧‧‧Sound Module

202‧‧‧First resonant cavity

204‧‧‧Second resonant cavity

210‧‧‧First resonance tube

220‧‧‧Second resonance tube

300‧‧‧Multimedia devices

310‧‧‧First sound module

320‧‧‧Second sound module

330‧‧‧ screen

1 is a conventional sounding module 100; FIG. 2 is a sounding module 200 according to one embodiment of the present invention; and FIG. 3 is a multimedia device 300 according to one embodiment of the present invention.

110‧‧‧Sheath

120‧‧‧Speakers

200‧‧‧Sound Module

202‧‧‧First resonant cavity

204‧‧‧Second resonant cavity

210‧‧‧First resonance tube

220‧‧‧Second resonance tube

Claims (10)

An audible module comprising: a casing layer containing a cavity; a speaker disposed in the cavity, the cavity being partitioned into a first resonant cavity and a second resonant cavity, each having an opening; The resonance tube is disposed at the opening of the first resonant cavity, facing the front of the speaker, and a second resonant tube disposed at the opening of the second resonant cavity, facing the back of the speaker. The sounding module of claim 1, wherein: the diameter and length of the first sounding tube and the second sounding tube are adjustable; the diameter of the first sounding tube is smaller than that of the first resonant cavity An inner diameter; a length of the first resonant tube is smaller than a length of the first resonant cavity; a diameter of the second resonant tube is smaller than an inner diameter of the second resonant cavity; and a length of the second resonant tube is smaller than the second resonant cavity length. The sounding module of claim 2, wherein: the speaker receives an audio signal to generate sound; and the first resonant cavity, the second resonant cavity, the first resonant tube, and the second resonant tube Resonance and phase difference at different frequencies are generated according to their respective calibers and lengths. The sounding module of claim 1, wherein: the first resonant cavity and the second resonant cavity are hollow square cylinders; and the first resonant tube and the second resonant pipe are hollow cylinders body. A multimedia device comprising a first sound module facing a first direction And the second sounding module is disposed in a second direction; wherein: the first sounding module and the second sounding module are identical in structure, each comprising: a shell layer containing a cavity; a speaker , in the cavity, the cavity is partitioned into a first resonant cavity and a second resonant cavity, each having an opening; a first resonant tube disposed at the opening of the first resonant cavity, facing the speaker a front side; and a second resonance tube disposed at the opening of the second resonant cavity, facing the back of the speaker. The multimedia device of claim 5, wherein: the diameter and length of the first resonance tube and the second resonance tube are adjustable; the diameter of the first resonance tube is smaller than the inside of the first resonance chamber a length of the first resonant tube is smaller than a length of the first resonant cavity; a diameter of the second resonant tube is smaller than an inner diameter of the second resonant cavity; and a length of the second resonant tube is smaller than a length of the second resonant cavity length. The multimedia device of claim 6, wherein: the multimedia device plays a stereo audio, the first utterance module plays a left channel, and the second utterance module plays a right channel, and the first utterance The first resonant cavity, the second resonant cavity, the first resonant tube and the second resonant tube in the module and the second sounding module generate resonance and phase difference of different frequencies according to respective calibers and lengths. The multimedia device of claim 5, wherein: the first resonant cavity and the second resonant cavity in the first sounding module and the second sounding module are hollow square cylinders; The first sound tube and the second sound tube in the first sounding module and the second sounding module are hollow cylinders. The multimedia device of claim 5, wherein the first direction and the second direction are opposite directions. The multimedia device according to claim 5 is a mobile phone, and further comprises a screen for displaying a picture.