CN215647300U

CN215647300U - Sound source positioning type pickup device

Info

Publication number: CN215647300U
Application number: CN202122005328.0U
Authority: CN
Inventors: 戴攀文
Original assignee: Beijing Kuaiyu Electronics Co ltd
Current assignee: Beijing Kuaiyu Electronics Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-01-25
Anticipated expiration: 2031-08-24

Abstract

The utility model discloses a sound source positioning type pickup device, which comprises a main shell and an upper cover arranged on the main shell, wherein an audio processing circuit board is arranged in the main shell, the main shell consists of an upper disc-shaped shell and a lower sharp-mouth-shaped shell, the periphery of the upper disc-shaped shell is provided with at least three first microphones, a second microphone is arranged in the sharp-mouth-shaped shell, each first microphone and each second microphone are respectively connected with the audio processing circuit board, the disc-shaped shell is provided with a first sound transmission hole corresponding to each first microphone, and the sharp-mouth-shaped shell is provided with a second sound transmission hole corresponding to the second microphone. The utility model realizes the positioning of the sound source direction of the hemispherical surface through the three-dimensional microphone array, optimizes the acoustic performance, reduces the obstruction of the device to acoustic transmission, and reduces the distortion and delay influence of the structure on sound transmission.

Description

Sound source positioning type pickup device

Technical Field

The utility model belongs to the technical field of audio acquisition, and particularly relates to a sound source positioning type pickup device.

Background

The utility model of the recording equipment provides convenience for meeting recording, security and protection evidence keeping and the like, but the recording microphones of the existing sound pick-up are planar arrays and can only obtain the angle of a horizontal sound source. Some methods adopt an approximate three-dimensional array structure, but structurally adopt a large-area chip structure, so that the structure needs to be bypassed during sound transmission, unstable factors are brought to sound distortion and delay, and the method is structurally not suitable for outdoor application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a sound source positioning type pickup device, which realizes the positioning of the direction of a hemispherical sound source and optimizes the acoustic performance by a three-dimensional microphone array consisting of a first microphone and a second microphone; the main shell body consisting of the disc-shaped upper shell and the sharp-mouth-shaped lower shell is adopted, so that the obstruction of the device to acoustic transmission is reduced, and the influence of the structure on sound transmission distortion and time delay is reduced; the left-hand thread type structure reduces the invasion of outdoor rainfall to the shell and is suitable for the outdoor severe application environment.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a sound source location type pickup apparatus, includes the main casing body and sets up the upper cover on this main casing body, the main internal audio frequency processing circuit board that is equipped with of casing, the main casing body comprises the disk epitheca on upper portion and the sharp mouth shape inferior valve of lower part, the periphery of disk epitheca is equipped with at least three first microphone, be equipped with the second microphone in the sharp mouth shape inferior valve, every first microphone with the second microphone respectively with the audio frequency processing circuit board is connected, the disk epitheca corresponds every first microphone is equipped with first sound-penetrating hole, sharp mouth shape inferior valve corresponds the second microphone is equipped with the second sound-penetrating hole.

Furthermore, the periphery of the disc-shaped upper shell is provided with at least three first microphone positioning grooves, and a first silica gel sleeve is arranged in each first microphone positioning groove.

Furthermore, a second microphone positioning groove is formed in the bottom of the pointed lower casing, and a second silica gel sleeve is arranged in the second microphone positioning groove.

Further, the first sound transmission hole is provided with a waterproof sound transmission membrane of IP66 grade, and the second sound transmission hole is provided with a waterproof sound transmission membrane of IP66 grade.

Furthermore, a waterproof rubber strip is arranged at the buckling position of the upper cover and the disc-shaped upper shell.

Furthermore, a fixing support is arranged above the second microphone.

Furthermore, the bottom surface of the disc-shaped upper shell is provided with a screw hole, and the upper cover is fixedly connected with the disc-shaped upper shell through a screw.

Further, the outer side of the screw hole is provided with a rubber cap.

Furthermore, the disc-shaped upper shell and the sharp-mouth-shaped lower shell are connected by a smooth curved surface.

Further, the main shell is of an integrated structure.

Compared with the prior art, the utility model has the following advantages:

1. the utility model realizes the hemispherical sound source direction positioning and optimizes the acoustic performance of the pickup device through the three-dimensional microphone array consisting of the first microphone and the second microphone.

2. The utility model adopts the main shell consisting of the disc-shaped upper shell and the sharp-mouth-shaped lower shell, thus reducing the obstruction of the device to acoustic transmission and reducing the influence of the structure on sound transmission distortion and time delay; the left-hand thread type structure reduces the invasion of outdoor rainfall to the shell, and the waterproof sound-transmitting membrane is added, so that the device is suitable for outdoor severe application environment and high IP protection level.

3. The disc-shaped upper shell and the sharp-mouth-shaped lower shell are in transition connection through smooth curved surfaces, so that water is discharged outside the first sound transmission hole as much as possible. Rainwater is concentrated in first sound-transmitting hole when avoiding the rainfall, causes the hindrance to sound.

4. According to the utility model, the waterproof rubber strip is arranged at the buckling position of the upper cover and the disc-shaped upper shell, and the upper cover and the main shell form a complete closed cavity by using the left-hand buckling structure and the waterproof rubber strip, so that the outdoor waterproof grade with high strength is achieved.

5. The utility model adopts the mode of fixing the silica gel sleeve and the waterproof sound-transmitting membrane. The upper structure withstands the rear part and prevents transportation and vibration from causing sealing failure.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Reference numerals: 1. a second sound-transmitting aperture; 2. a main housing; 3. a second silica gel sleeve; 4. a second microphone; 5. fixing a bracket; 6. a first sound-transmitting aperture; 7. a first silica gel sleeve; 8. a waterproof rubber strip; 9. a first microphone; 10. and (7) covering.

Detailed Description

The following further describes a specific embodiment of a sound source positioning type sound pickup apparatus according to the present invention with reference to the accompanying drawings. A sound source localization type sound pickup apparatus of the present invention is not limited to the description of the following embodiments.

The first embodiment is as follows:

referring to fig. 1, a sound source positioning type sound pickup device comprises a main housing 2 and an upper cover 10 arranged on the main housing, wherein an audio processing circuit board is arranged in the main housing, the main housing 2 is composed of a disc-shaped upper shell at the upper part and a sharp-mouth-shaped lower shell at the lower part, three first microphones 9 are arranged on the periphery of the disc-shaped upper shell, a second microphone 4 is arranged in the sharp-mouth-shaped lower shell, each first microphone 9 and each second microphone 4 are respectively connected with the audio processing circuit board, a first sound penetrating hole 6 is arranged below the disc-shaped upper shell corresponding to each first microphone, and a second sound penetrating hole 1 is arranged below the sharp-mouth-shaped lower shell corresponding to the second microphone.

In this embodiment, the sound source positioning type sound pickup apparatus uses a three-dimensional microphone array, three first microphones 9 are used in the horizontal plane, and one second microphone 4 is placed at a certain distance perpendicular to the plane to form an inverted pyramid. The horizontal angle and the vertical tilt angle corresponding thereto can be algorithmically separated to obtain the stereo angular (X, Y) direction of the sound source. There cannot be a large obstacle (area) to acoustic noise for the propagation path of sound, otherwise the sound of high frequency is forced to bypass the obstacle instead of propagating straight. In the positioning algorithm, calculation errors are introduced. In the embodiment, the long and thin sharp-mouth-shaped lower shell is adopted, so that the barrier surface of the whole structure is reduced to the minimum, the influence on sound transmission is greatly reduced, and the original signal precision of algorithm calculation is ensured.

Referring to fig. 1, in this embodiment, the sound source localization in far field is mostly used in outdoor conditions, the overall structure is designed in a reverse buckling manner, and the disc-shaped upper shell and the sharp-mouth-shaped lower shell are transitionally connected by a smooth curved surface, so as to exclude water from the first sound-transmitting hole as much as possible. The first sound-transmitting holes cannot be concentrated, so that the sound is blocked when raining. The flat structure on upper portion and the long and thin structure of lower part, when outdoor application, the windage is less, is difficult for being blown easily by strong wind, leads to the mounted position to change.

Referring to fig. 1, in the present embodiment, three first microphone positioning slots are formed in the periphery of the disc-shaped upper shell, and a first silicone sleeve 7 is disposed in each first microphone positioning slot; a second microphone positioning groove is formed in the bottom of the sharp-mouth-shaped lower shell, and a second silica gel sleeve 3 is arranged in the second microphone positioning groove; the first sound-transmitting hole 6 is provided with a waterproof sound-transmitting membrane of IP66 grade, and the second sound-transmitting hole 1 is provided with a waterproof sound-transmitting membrane of IP66 grade. The first sound-transmitting hole and the second sound-transmitting hole adopt waterproof sound-transmitting membranes of IP66 grade, and the first sound-transmitting hole and the second sound-transmitting hole are fixed with the main shell in a silica gel sleeve mode, so that sufficient waterproof performance and low-frequency anti-interference performance are provided.

Referring to fig. 1, in the present embodiment, a waterproof rubber strip 8 is provided at the fastening position of the upper cover 10 and the disc-shaped upper shell. The upper cover 10 and the main shell 2 form a complete closed cavity by using a back-off structure and the waterproof rubber strip 8, so that the outdoor waterproof grade with high strength is achieved.

In the stereo array, the first microphones 9 on three horizontal planes can calculate the sound source angle in the horizontal direction. The second microphone 4 below the horizontal plane and each first microphone 9 of the horizontal plane may form a longitudinal (perpendicular to the horizontal plane) angle with each other, and the longitudinal angle may be positioned in a triangular manner. Thereby obtaining the vector angle in the horizontal and vertical directions and finally obtaining the angle information of the hemispherical surface.

In the pickup device, the sound enhancement algorithm is adopted, so that the sound information of all the microphones can be processed and superposed to obtain the sound with higher tone quality, and the sound in other directions can be strongly inhibited. Thereby obtaining the enhanced sound at the sound source and achieving the purpose of sound enhancement.

Referring to fig. 1, structurally, the main housing 2 is an integral structure of upper and lower housings, the audio processing circuit board is directly fixed in the disc-shaped upper housing, and a fixing bracket 5 is arranged above the second microphone 4 to fix the second microphone 4 in the structure, so that the second microphone 4 is formed at a sound collecting position with a certain distance from the plane. The three first microphones 9 of the horizontal plane are placed in the three first microphone positioning grooves of the horizontal plane in a lead wire mode. The silica gel sleeve and the waterproof sound-transmitting membrane are adopted for fixation. The upper structure withstands the rear part and prevents transportation and vibration from causing sealing failure.

The cooperation of upper cover and main casing body adopts interior knot mode, and the bottom surface of disk epitheca is equipped with the screw hole, and upper cover 10 passes through screw fixed connection with the disk epitheca. The stainless steel screw is locked into the upper cover from the lower part, and the outer side of the screw hole is provided with a rubber cap. The rubber cap seals the screw position, and the surface of the upper cover 10 has no screw hole.

The utility model realizes the positioning of the sound source direction of the hemispherical surface through the three-dimensional microphone array, optimizes the acoustic performance of the pickup device, reduces the obstruction of the device to acoustic transmission, and reduces the influence of the structure on sound transmission distortion and time delay. On this basis, holistic left-hand thread formula structure reduces the invasion of outdoor rainfall to the casing, increases waterproof sound-transmitting membrane for the device is adapted to comparatively abominable application environment in open air and higher IP protection level.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. A sound source localization type sound pickup apparatus comprising a main casing (2) and an upper cover (10) provided on the main casing, characterized in that: the main internal audio frequency processing circuit board that is equipped with of casing, main casing (2) comprise the disk epitheca on upper portion and the sharp mouth shape inferior valve of lower part, the periphery of disk epitheca is equipped with at least three first microphone (9), be equipped with second microphone (4), every in the sharp mouth shape inferior valve first microphone (9) with second microphone (4) respectively with the audio frequency processing circuit board is connected, the disk epitheca corresponds every first microphone is equipped with first sound transmission hole (6), sharp mouth shape inferior valve corresponds the second microphone is equipped with second sound transmission hole (1).

2. The sound source localization type sound pickup device according to claim 1, wherein: the periphery of the disc-shaped upper shell is provided with at least three first microphone positioning grooves, and a first silica gel sleeve (7) is arranged in each first microphone positioning groove.

3. The sound source localization type sound pickup device according to claim 1 or 2, wherein: and a second microphone positioning groove is formed in the bottom of the sharp-mouth-shaped lower shell, and a second silica gel sleeve (3) is arranged in the second microphone positioning groove.

4. The sound source localization type sound pickup device according to claim 1, wherein: the first sound-transmitting hole (6) is provided with a waterproof sound-transmitting membrane of IP66 grade, and the second sound-transmitting hole (1) is provided with a waterproof sound-transmitting membrane of IP66 grade.

5. The sound source localization type sound pickup device according to claim 1, wherein: and a waterproof rubber strip (8) is arranged at the buckling part of the upper cover (10) and the disc-shaped upper shell.

6. The sound source localization type sound pickup device according to claim 1, wherein: and a fixed bracket (5) is arranged above the second microphone (4).

7. The sound source localization type sound pickup device according to claim 1, wherein: the bottom surface of the disc-shaped upper shell is provided with a screw hole, and the upper cover (10) is fixedly connected with the disc-shaped upper shell through a screw.

8. The sound source localization type sound pickup device according to claim 7, wherein: and a rubber cap is arranged on the outer side of the screw hole.

9. The sound source localization type sound pickup device according to claim 1, wherein: the disc-shaped upper shell and the sharp-mouth-shaped lower shell are connected by a smooth curved surface.

10. The sound source localization type sound pickup device according to claim 1, wherein: the main shell (2) is of an integrated structure.