CN208985689U - A kind of active noise reduction external device - Google Patents

Abstract

The utility model discloses a kind of active noise reduction external devices, including three noise signal acquisition unit, signal processing unit and reversed noise signal output unit parts.Noise signal acquisition unit acquires ambient noise signal by sound pick-up, inverse noise mode signal output there are four types of being set on the signal handling equipment, it is the way of output one respectively, the way of output two, the way of output three and the way of output four, the signal handling equipment is equipped with wireless device, external speaker, non-wireless means and boombox, the way of output is first is that signal handling equipment exports inverse noise to existing sound system by wireless device, the way of output is second is that signal handling equipment exports inverse noise signal to external speaker, the way of output is third is that signal handling equipment exports inverse noise signal to existing sound system by non-wireless means, the way of output is fourth is that signal handling equipment directly plays inverse noise by boombox；The utility model is applied widely.

Description

A kind of active noise reduction external device

Technical field

The utility model relates to noise reduction field, in particular to a kind of active noise reduction external devices.

Background technique

Noise will affect in life people normally rest, study and work, reversed sound wave active noise reduction is a kind of existing Modern achievable technology, principle are to play that frequency spectrum is identical, reversed noise sound wave of opposite in phase, reach and eliminate noise or drop The purpose of low noise intensity.

Active noise reduction techniques have been frequently applied on earphone, some superior automobiles also genuine built-in active noise reduction Stereo set, but actively to be dropped in the vehicles or building of active noise reduction equipment built in non-genuine using reversed sound wave It makes an uproar technology, improves and drive comfort level or residence comfort, be to be inconvenient to realize now, because the invention one kind conveniently realizes master The dynamic corresponding external device of decrease of noise functions becomes this social urgent problem to be solved.

Utility model content

The technical problems to be solved in the utility model is in the prior art will be in the friendship of active noise reduction equipment built in non-genuine The problems such as reversed sound wave active noise reduction techniques of use in logical tool or building, the prior art can not achieve.

In order to solve the above technical problems, technical solution provided by the utility model are as follows: a kind of active noise reduction external device, packet Include three noise signal acquisition unit, signal processing unit and reversed noise signal output unit parts, the signal processing list Member includes signal handling equipment, and the signal handling equipment is equipped with sound pick-up, wireless output, external speaker and wired output, The noise signal acquisition unit is to acquire ambient noise signal by sound pick-up, which sends signal processing unit to by signal Processing equipment carries out noise signal analysis processing, and treated, and inverse noise signal is exported by signal output unit, signal output Comprising four kinds of modes, it is respectively: the way of output one, the way of output two, the way of output three and the way of output four, the way of output The inverse noise signal handled well is is transferred to existing sound system by wirelessly output by one, is played by existing sound system anti- To noise, the wireless output includes bluetooth, frequency modulation, radio frequency, infrared ray, WIFI, DLNA transmission mode, the way of output two Inverse noise signal will to handle well is transmitted to external speaker, plays inverse noise, the way of output three by external speaker Inverse noise signal will to handle well is transferred to existing sound system by wired output, is played by existing sound system reversed Noise, the signal handling equipment inside are equipped with loudspeaker, and the way of output four is as the loudspeaking built in signal handling equipment Device directly plays inverse noise.

Further, the existing sound system need to have the ability of wireless wire signal input, and can turn the signal It is changed to sound broadcasting.

Further, the external speaker may be equipped with 1 group, two or more sets loudspeakers.

Further, the signal handling equipment is external is equipped with sound pick-up.

Further, the sound pick-up may be provided in signal handling equipment.

Further, four kinds of way of outputs, which can individually have also combine, has.

Further, the loudspeaker built in the signal handling equipment, which can have, can not also have.

Utility model compared with prior art the advantages of be: a kind of active noise reduction external device of the utility model is effectively It solves problems of the prior art, has many advantages, such as easy to use, function admirable；The utility model passes through active noise reduction The noise in the vehicles or building is effectively reduced in external device, achievees the effect that improve and drives comfort level or residence comfort； What this equipment can be convenient, which be installed in the various vehicles, building interior etc., needs to reduce in the local environment of noise intensity, In the range of the range of the local environment is defined as the acquisition range of sound pick-up and the equipment that plays reversed sound wave can influence. This practical technology can be applied to the vehicles such as automobile, motorcycle, aircraft, steamer, manned spacecraft or building interior And the outdoor region etc. for needing to reduce noise intensity, it is applied widely, it is suitable for socially promoting the use of.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of active noise reduction external device of the utility model.

It is as shown in the figure: 1, signal handling equipment, 2, sound pick-up, 3, wireless device, 4, external speaker, 5, non-wireless means, 6, Loudspeaker.

Specific embodiment

The following describes the utility model in further detail with reference to the accompanying drawings.

In conjunction with attached drawing 1, describe in detail to the utility model.

The utility model provides a kind of active noise reduction external device, including noise signal acquisition list in the specific implementation Three member, signal processing unit and reversed noise signal output unit parts, the signal processing unit includes that signal processing is set Standby 1, the signal handling equipment 1 is equipped with sound pick-up 2, wirelessly output 3, external speaker 4 and wired output 5, the noise letter Number acquisition unit is to acquire ambient noise signal by sound pick-up 2, which sends signal processing unit to by signal handling equipment 1 Noise signal analysis processing is carried out, treated, and inverse noise signal is exported by signal output unit, and signal output includes four kinds Mode is respectively: the way of output one, the way of output two, the way of output three and the way of output four, and the way of output one is that will locate The inverse noise signal managed is transferred to existing sound system by wirelessly output 3, plays inverse noise by existing sound system, The wireless output 3 includes bluetooth, frequency modulation, radio frequency, infrared ray, WIFI, DLNA transmission mode, and the way of output two is that will locate The inverse noise signal managed is transmitted to external speaker 4, plays inverse noise by external speaker 4, the way of output three is will The inverse noise signal handled well is transferred to existing sound system by wired output 5, is reversely made an uproar by existing sound system broadcasting Sound, loudspeaker 6 is equipped with inside the signal handling equipment 1, and the way of output four is as the loudspeaking built in signal handling equipment 1 Device 6 directly plays inverse noise.

The existing sound system has the ability of wireless wire signal input, and converts the signal into sound broadcasting. The external speaker 3 is equipped with loudspeaker.

A kind of specific implementation process of active noise reduction external device of the utility model is as follows: four kinds of output in the utility model Mode can be adopted by the sound pick-up 2 built in the sound pick-up 2 or the instrument that are connected with the instrument with independent role also compound action Collect noise signal, output spectrum is equal after instrument analysis processing, reversed acoustic signals of opposite in phase, and the signal is defeated Out to the existing sound system or external speaker of the vehicles, or pass through the loudspeaker 6 built in the equipment, plays inverse noise Sound wave achievees the purpose that eliminate noise or reduces noise intensity, improves driving or residence comfort.Due to smart phone, intelligence The intelligent movables equipment such as plate has been provided with each hardware in above-mentioned figure, therefore, real in intelligent movable equipment by APP software The existing function belongs to the range of the utility model protection.

The utility model and embodiments thereof are described above, this description is no restricted, shown in attached drawing Be also one of the embodiments of the present invention, actual structure is not limited to this.All in all if this field Those of ordinary skill is enlightened by it, without deviating from the purpose of the present invention, not inventively design with The similar frame mode of the technical solution and embodiment, all should belong to the protection range of the utility model.

Claims (3)

1. a kind of active noise reduction external device, it is characterised in that: including noise signal acquisition unit, signal processing unit and reversed Three parts of noise signal output unit, the signal processing unit include signal handling equipment (1), the signal handling equipment (1) sound pick-up (2), wireless output (3), external speaker (4) and wired output (5), the noise signal acquisition unit are equipped with It is to acquire ambient noise signal by sound pick-up (2), which sends signal processing unit to and made an uproar by signal handling equipment (1) Acoustic signal analysis processing, treated, and inverse noise signal is exported by signal output unit, and signal output includes four kinds of modes, point Be not: the way of output one, the way of output two, the way of output three and the way of output four, the way of output one will be handled well Inverse noise signal is transferred to existing sound system by wirelessly output (3), plays inverse noise by existing sound system, described Wireless output (3) includes bluetooth, frequency modulation, radio frequency, infrared ray, WIFI, DLNA transmission mode, and the way of output two is that will handle Good inverse noise signal is transmitted to external speaker (4), plays inverse noise by external speaker (4), the way of output three is The inverse noise signal handled well is transferred to existing sound system by wired output (5), is played by existing sound system anti- To noise, loudspeaker (6) are equipped with inside the signal handling equipment (1), the way of output four is by signal handling equipment (1) Built-in loudspeaker (6) directly plays inverse noise.

2. a kind of active noise reduction external device according to claim 1, it is characterised in that: the existing sound system has Wirelessly, the ability of wire signal input, and convert the signal into sound broadcasting.

3. a kind of active noise reduction external device according to claim 1, it is characterised in that: set on the external speaker (4) There is loudspeaker.