JPH0595591A - Acoustic reproducing system - Google Patents

Abstract

PURPOSE:To obtain the compact system with satisfactory characteristic and no feeling of pressure by reproducing a low frequency at a reproducing device fitted near the ears and executing reproduction from an intermediate frequency to a high frequency by spatial radiation clue to a speaker. CONSTITUTION:Compact headphones 1 and 1 for low sound are fitted to a space surrounded by external auditory miatus ports 12a and conchae in both ears 12, these two headphones 1 and 1 for low sound are respectively connected to a DSP 2 by wires 3, and this DSP 2 and compact speakers 4 and 4 for intermediate and high frequencies are respectively connected by wires 3. Since the radiated sound of the headphone 1 for low sound generates acoustic compliance with the cavity effect of the ear, alive regenerative sounds are synthesized. On the other hand, for intermediate and high sounds, radiated sounds from the compact speakers 4 are directly heard by the ears 12. At such a time, the difference of arrival time to the ears 12 between the low sound and the intermediate/high sounds generated from the system, the difference of right and left levels and the difference of phases, etc., can be freely controlled and corrected by the DSP 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing system, and more particularly to a sound reproducing system which is compact and suitable for low frequency sound reproduction.

[0002]

2. Description of the Related Art Conventionally, as a sound producing device provided at the final stage of a small-sized sound reproducing system, many devices shown in FIGS. 4 and 5 have been provided.

In the figure, 11 is a human face, 12 is an ear, 13 is a stereo headphone, 13a is a headband of the headphone 13, 14 is a small low-range speaker, and 15 is a small medium-high range speaker. is there.

In the conventional sound reproducing system, a headphone 13, a crystal type earphone (not shown) and an inner ear type headphone are used as a small reproducing system. As a direct-radiation type small-sized reproducing system using a speaker, a low-frequency speaker 14 having an internal volume of 10 liters and small medium- and high-frequency speakers 15, 15 on the left and right are used as shown in FIG.

[0005]

However, in the above-mentioned conventional sound reproduction system using a headphone or the like, since the ear is pressed, there is always a feeling of oppression, and the localization of the sound of vocals is out of the head. It had the drawback of not being able to.

Further, in the case of using a small speaker,
The internal volume of the low range speaker has reached several tens of liters, and it was necessary to choose the installation location.

The low-pitched sound is not attenuated and is transmitted to a distant place, causing noise pollution to the next house, so that only a small sound can be produced.

The present invention has been made in view of the above-mentioned points, and an object thereof is to solve the drawbacks of the conventional example, to provide a sound reproducing system having a small size, no feeling of pressure, and good characteristics. is there.

[0009]

According to the sound reproducing system of the present invention, in the sound reproducing system, low frequency reproduction is performed by a reproducing device mounted near the ear, and reproduction from a mid range to a high range is performed by a speaker. It is configured to be performed by spatial radiation.

The reproducing device attached near the ear uses bone conduction.

Further, the digital signal processor incorporated in the reproduction system can control and correct the time difference between the sound reaching the ear and the sound in the low and middle frequencies.

[0012]

According to the present invention, low-frequency reproduction is performed by a reproduction device mounted in the vicinity of the ear by a headband, and reproduction is performed by a small speaker in the mid-range to high range, and the difference in sound arrival time is digital signal processor. (Hereinafter DSP
It is corrected by changing.

Further, by using a reproducing device utilizing bone conduction for low frequency reproduction, the size is reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sound reproducing system according to the present invention will be described with reference to FIGS.

The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

In the figure, 1 is a small bass headphone for low frequency reproduction, which is attached to a space surrounded by the external auditory meatus of the left and right ears 12 and an auricle by a headband (not shown), 2
Is a DSP that is incorporated in the sound reproduction system and controls the time difference of arrival sounds in the low and middle and high ranges, and controls the left and right sound pressure, phase difference, localization, etc., 3 is a wire connecting each unit of the sound reproduction system, 4 is a small loudspeaker for the middle and high frequencies, which is considerably distant from the ear 12, and 5 is a headset that attaches a vibrator unit to the headband 13a and vibrates the mastoid at the rear of the ear 12 to reproduce bass by bone conduction.
It is connected to the. 6 is a small headphone for low frequencies
12 chin-mounted headphones attached to the lower two chins
a is the external auditory meatus of the ear 12, and 12b is the auricle.

In the first embodiment of the present invention, as shown in FIG. 1, small bass headphones 1 and 1 are attached to a space surrounded by an ear canal 12a and an auricle 12b of both ears 12, respectively. ,
These two low-pitched headphones 1 and 1 are connected by the wire 3.
Each of them is connected to a DSP 2, and the DSP 2 and the small loudspeakers 4 and 4 for middle and high frequencies are connected by a wire rod 3, respectively.

The radiated sound of the low-pitched headphone 1 produces acoustic compliance due to the cavity effect at the ear, whereby a powerful reproduced sound is synthesized. Since this bass is not affected by a reflector such as a speaker incorporated in the box, it has a flat characteristic.

As for the middle and high tones, the radiated sound from the small speaker 4 is directly heard by the ear 12. At this time, the DSP 2 freely controls and corrects the arrival time difference between the low tone and the middle and high tone generated on the system, the left-right level difference, the phase difference, and the like.

In the second embodiment, as shown in FIG. 2, the mastoid projections at the rear parts of both ears 12, 12 are vibrated by the headsets 5, 5 to reproduce the low-pitched sound by bone conduction. Similar to the first embodiment, the headsets 5 and 5 are connected to the two small loudspeakers 4 and 4 for the middle and high tones via the DSP 2, and the difference between the arrival time of the low tone and the high tones to the ear 12 and the left and right levels. Differences and phase differences are freely controlled and corrected by the DSP 2.

In the application example shown in FIG. 3, powerful bass reproduction is performed by utilizing the bone conduction as well as the radiated sound by the small chin-mounted headphones 6 and 6 attached to both chins. The chin headphones 6 and 6 are also connected to the DSP 2 and the small and high-range loudspeakers 4 and 4 as in the above-described embodiment.

[0022]

Since the sound reproducing system according to the present invention is constructed as described above, the following effects can be obtained.

(1) There is no feeling of pressure because the ear is not covered or inserted.

(2) Vocals can be localized out of the head, and phase correction and general localization correction can be performed.

(3) Since it is small, it can be installed in any place, and acoustic bad conditions in the room (f special deterioration due to reflection) can be eliminated.

(4) Bass is played at a low volume near the ears or by bone conduction, so even if the listener hears it at a high volume, it is not transmitted to the next house, so the whole system is enjoyed at a high volume. be able to.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a sound reproduction system of the present invention.

FIG. 2 is a side view of an essential part showing the second embodiment.

FIG. 3 is a front view of a main part showing the same application example.

FIG. 4 is a front cross-sectional view of a main part showing a conventional sound reproduction system.

FIG. 5 is a perspective view showing another example.

[Explanation of symbols]

 1 Headphones for bass 2 DSP (Digital Signal Processor) 3 Wire material 4 Small speaker 5 Headset 6 Headphone with chin 11 Face 12 Ears 12a Ear canal opening 13a Headband

Claims (3)

[Claims] 1. A sound reproducing system, wherein low-frequency reproduction is performed by a reproducing device mounted near an ear, and reproduction from a mid-range to a high range is performed by spatial emission from a speaker. Playback system. 2. The sound reproducing system according to claim 1, wherein the reproducing device attached near the ear uses bone conduction. 3. A digital device incorporated in a reproduction system.
3. The sound reproduction system according to claim 1, wherein the signal processor controls and corrects the time difference between the sound reaching the ears and the sound in the low and middle frequencies.