CN2342535Y

CN2342535Y - Loudspeaker box

Info

Publication number: CN2342535Y
Application number: CN 98233841
Authority: CN
Inventors: 关伟核
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-19
Filing date: 1998-03-19
Publication date: 1999-10-06
Anticipated expiration: 2008-03-19

Abstract

The utility model relates to a loudspeaker box which is designed by utilizing the human body sounding principle and is composed of a loudspeaker (1), a supporting partition plate (5), a sealed power-assisted cavity (2) arranged behind the loudspeaker, a semi-sealed resonance cavity (3) arranged in front of the loudspeaker, and a sound releasing port (4). By adjusting the proportion of the resonance cavity, the power-assisted cavity and the sound releasing port, a favorable replaying effect can be obtained. The utility model has the advantages of low cost, simple manufacture and adjustment, low requirements for power amplifiers, material and energy saving, less noise pollution to environments, etc. The utility model is matched with a designed frequency divider to be made into a tap type, the material can also be saved, and the fabrication is also simple.

Description

Loudspeaker enclosure

The utility model dominant rings the field.

In the loudspeaker enclosure design in sound equipment field, without any providing the utility model data for referencial use.

Loudspeaker enclosure is mainly used in the replaying effect that improves low-frequency sound.Popular having " inverted phase type " at present, " closed ", " air-flow group formula " etc., design philosophy is: the resonance frequency of adjusting tank obtains the frequency response an of the best.Therefore, design considerations, power amplifier, tank material, manufacture craft, adjustment technology, sound-absorbing material etc. are had relatively high expectations, thereby cost height, energy consumption are big, and effect improves few.The utility model proposes a brand-new design philosophy at the problems referred to above, the simplified design program, and the difficulty of attenuating manufacture craft reduces the requirement to power amplifier, and material-saving is energy-conservation again, and the sound reproduction effect might as well.

The sound generating mechanism of human body is: splanchnocoel provides the energy of control vocal cords amplitude, and vocal cord vibration produces sound, and this sound is very faint, needs the sympathetic response through pharyngeal cavity, oral cavity, and the people is heard.In this process, " sympathetic response " (sound repeatedly reflects, mixes intraoral) is actually the amplification process of sound.The utility model just around this principle is used in " sympathetic response " phenomenon in the audio amplifier design.So, be called for short " sympathetic response formula " audio amplifier.

Principle such as Fig. 1 of " sympathetic response formula " audio amplifier, by dividing plate＜5〉audio amplifier is divided into two cavitys, loud speaker＜1〉be installed on the dividing plate, the cavity of loud speaker back is airtight, cry power-assisted chamber or energy-storing chamber＜2 〉, the cavity of loud speaker front is resonator＜3〉have big sound mouth＜4 of releasing 〉, the cavity of a semi-hermetic at last.When loud speaker moves backward, the air in the compression power-assisted chamber, because this chamber is airtight, the atmospheric pressure altar is big in the chamber; When loud speaker travels forward, the air expansion that has compressed, strengthened loud speaker thrust forward, the sound that sends has obtained reinforcement, imitative splanchnocoel as human body, gas-storing capacity is big, sound just can be a little greatly the same, and sound reflection in resonator, mixing, energy stack spread out of from release the sound mouth with abundant partials, finished the sympathetic response process, imitative oral cavity as human body.Adjust power-assisted chamber, resonator, release the ratio of sound mouth, just can obtain different sound effects, imitative as the people can control sound by adjustment laryngeal muscles, oral cavity size effect.

This have a closed chamber, a semi-hermetic chamber, a big sympathetic response formula audio amplifier of releasing the sound mouth, and not existing together with other audio amplifier also has:

1. inverted phase type has only a cavity, and sound releasing hole is little, need join phase-reversing tube;

2. closed has only a cavity, no sound releasing hole;

3. though air-flow group formula has two cavitys, each cavity all has sound releasing hole, and sound releasing hole is little, joins phase-reversing tube, and actual is the combination of two phase inverting box.

Sympathetic response formula audio amplifier uses through reality following advantage:

1. tank material is less demanding, and jigsaw also can;

2. manufacture craft is simple, is not afraid of a spot of gas leakage;

3. use simple low stage power amplifier, playback effect is also fine;

4. the small volume playback can meet the demands, and does not also have during big volume playback and causes heartbeat, and the noise pollution outdoor to playback is few.

It is tapped cooperating the coil that uses in the frequency divider of sympathetic response formula audio amplifier design, and also with at present popular different, same material-saving is energy-conservation.

The utility model sympathetic response formula audio amplifier has following feature:

First feature: loud speaker＜1〉before and after a cavity respectively arranged, middle by dividing plate＜5〉separately.

Second feature: the cavity of loud speaker back is airtight, claims power-assisted chamber＜2 〉.

The 3rd feature: the cavity of loud speaker front is a semi-hermetic, is called resonator＜3 〉, have and release sound mouth＜4.

The 4th feature: the frequency divider that is used, coil wherein is tapped.

The scheme of sympathetic response formula audio amplifier now is described with six embodiment:

Fig. 2 is the big body structure figure of loud speaker flatwise, and loud speaker is towards last, and level is installed on the dividing plate, is the power-assisted chamber below, is its tymapanum above, releases the sound mouth and is located at directly over the casing.

Fig. 3 is that loud speaker is sidelong the middle and high sound loudspeaker box of formula band structure chart, is divided into upper and lower two intervals with plank, the last positive at interval middle and high sound loud speaker of installing, be for preventing the low frequency influence, following interval is the utility model, and loud speaker is vertically mounted on the dividing plate towards a left side, the right side is the power-assisted chamber, the left side is a resonator, releases the sound mouth and is located at down left side at interval, all can in positive, the back side, in order to match, another case is released the sound mouth and should be located in the other direction.

Fig. 4 is the another kind of form that loud speaker is sidelong the middle and high sound loudspeaker box of formula band, do not establish the interval that separates middle and high sound and woofer, only at the nearly middle and high sound loud speaker of dividing plate on one side, have and be convenient to the breach that middle and high sound loud speaker is installed, woofer is towards a left side, be vertically mounted on the dividing plate, the right side is the power-assisted chamber, and the left side is resonator, release the sound mouth is located at the left side, just, the back side all can, in order to match, another case is released the sound mouth and should be located in the other direction.

Fig. 5 is a loud speaker flatwise small box structure chart, and loud speaker is vertically mounted on the dividing plate towards last, is the power-assisted chamber below, above for resonator, release the sound mouth and be located at above the casing and hit exactly.

Fig. 6 is that loud speaker is sidelong formula small box structure chart, and loud speaker is vertically mounted on the dividing plate towards a left side, and the right side is the power-assisted chamber, and the left side is a resonator, release the sound mouth and be located at the left side, and be pairing, another case is released the sound mouth and should be located on the opposite direction.

Fig. 7 is the frequency divider electrical schematic diagram that cooperates resonant tank.Coil can coiling on the core of diameter 40mm, wide 20mm, L ₁Be 30 circles, L ₂Be 20 circles, L ₃Be 50 circles, the enamelled wire diameter is 1mm, also can make the tread flaking formula.

Adjust for convenience, during actual fabrication, according to the casing size, (scale is also not really important greater than the principle in power-assisted chamber to press resonator, the casing vast scale can be more greatly, and the casing small scale can be littler), with the fixed ratio in resonator and power-assisted chamber, the size of sound mouth is released in adjustment, playback is seen fit get final product.If feel in the excessive resonator of loud speaker amplitude that the sound reverberation time is long, can be in the hole that power-assisted chamber bottom margin bores one or more 10mm, lower the air pressure in power-assisted chamber and the reverberation time is shortened.

Claims

1. loudspeaker enclosure, in the middle of it is characterized in that by dividing plate＜5 be divided into two cavitys, loud speaker＜1〉be installed in dividing plate＜5〉on, the loud speaker back is airtight power-assisted chamber＜2〉the loud speaker front is to have to release sound mouth＜4 resonator＜3 of semi-hermetic, the coil of adapted frequency divider is tapped.

2. loudspeaker enclosure according to claim 1 is characterized in that having resonator＜3 of passive acoustic amplification 〉.

3. loudspeaker enclosure according to claim 1 is characterized in that adjusting power-assisted chamber＜2 〉, resonator＜3, release sound mouth＜4 between ratio, can change the sound reproduction effect.

4. loudspeaker enclosure according to claim 1 is characterized in that punching on the power-assisted chamber, lowers air pressure intensity, can change the reverberation of sound time in its tymapanum.

5. loudspeaker enclosure according to claim 1 is characterized in that the coil in the frequency divider of institute's adapted is tapped.