JPH01296800A - Stereo headphone sound field corrector - Google Patents

Abstract

PURPOSE:To decrease horizontal sound pressure difference at low temperature and to obtain a headphone sound field similar to actual sound field by connecting a means to weaken the sensor of direction of a low sound of a stereo headphone. CONSTITUTION:A low pass filter(LPF) 2 as a means to form crosstalk at a low sound frequency as means weakening the sense of direction of the low sound frequency is connected between right and left channels with respect to a couple L, R stereo headphones 1 from an output terminal 3 of a stereo amplifier. Thus, even if a sound source where a low sound frequency exists in the left channel only, for example, since crosstalk exists at the low sound frequency, the low sound frequency is listened to with well balance from the right receiver and the sound field is corrected to the headphone sound field close to the actual sound field where the sense of direction of the low sound frequency is weak.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stereo headphone sound field correction device.

(Prior Art and Problems to be Solved) In stereo headphones, it has been difficult to always reproduce a highly realistic sound field in the entire range of high and low frequencies. The main reason for this is that stereo headphones can reproduce high-frequency sounds that have a strong sense of direction in a state close to the actual sound field.
In an actual sound field, bass sounds with a weak sense of direction and unclear sound image localization are reproduced by separation by the left and right input circuits as if they were a sound field with a strong sense of direction and clear sound image localization. Sometimes discrepancies with the sound field occurred.

This phenomenon is unique to stereo headphones, where the left and right receivers create a mutually independent sound field space for each earplug, and is not a problem with audio equipment that predominantly uses speaker systems. The cause of this discomfort was not clarified and no countermeasures were taken. However, in recent years, as stereo headphones have become more and more contradictory, users have begun to point out that they feel uncomfortable, and a solution to this problem has been demanded.

Humans mainly perceive the direction of a sound source based on the sound pressure difference between the left and right ears and the phase angle, but in reality, in the case of low-pitched sounds, both the sound pressure difference and the phase angle difference are often significantly smaller.

With conventional stereo headphones, abnormal sound pressure differences in bass sounds can occur, and this was the main cause of discomfort, but it did not receive attention and the sound pressure differences were ignored.

The device of the present invention mainly reduces the sound pressure difference between left and right bass sounds.
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The aim is to reproduce the G°4056°'81' sound field.

In other words, the present invention eliminates the feeling of discomfort in stereo headphones because the bass sounds, which should originally have a weak sense of direction, are separated into the left and right re-input circuits, and each receiver creates an independent left and right sound field space. L1t is heard as if it had a clear sound image localization.

In this re-input circuit, we have discovered that an excellent sense of presence can always be obtained by crossing the low-frequency signals and making the low-frequency component have a weak sense of direction, just like an actual sound field.

(Means for Solving the Problems) That is, an object of the present invention is to provide a means for weakening the sense of direction of bass sounds of stereo headphones. ? (9) Weakening the sense of direction of bass sounds of stereo headphones) 8. i
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A stereo headphone 1'' characterized in that a means for creating crosstalk is connected to the low frequency range is achieved by a field correction device.

As a specific means for creating crosstalk in the low frequency range between the left and right channels, it is preferable to connect the left and right channels with a low-pass filter.

(Function) In the present invention, when a sound source is used in which a means for creating bass crosstalk is connected between the left and right channels as a means for weakening the sense of direction of bass sounds of stereo headphones, for example, a sound source in which bass components exist only in the left channel is used. However, since there is crosstalk in the bass range, the bass can be heard in a well-balanced manner from the right receiver, and the weak sense of bass direction can be corrected to a headphone sound field that approximates the actual sound field.

(Example) The drawings are explanatory diagrams showing one embodiment of the present invention.

In the figure, the output terminal (
A pair (L) (R) of stereo headphones (1) from 3)
) A low-pass filter (LPF) (2) is connected between the left and right channels for creating crosstalk in the low B range as a means for weakening the sense of direction of bass sounds.

The impedance of the stereo headphones in this example is approximately 4.
0Ω, and when a coil was used as the LPF, its inductance had various values between 100all and 5sH. If it is over 100s+H, you will not feel much of an effect, while if it is below 511, the side effect will be that the separation in the high frequency range will be markedly deteriorated, making it difficult to feel the natural spread of the sound field. A headphone sound field was obtained.

The low-pass filter can be connected at any location where a monaural sound field can be created by connecting conductors, as long as a low-pass filter with characteristics appropriate for that location is selected.

As a result of listening to the prototype, 9 out of 10 people were surprised and satisfied with the natural effect of the device of the present invention.

[Brief explanation of the drawing]

The drawings are explanatory diagrams showing one embodiment of the present invention. (1) Stereo headphones (1-) Left receiver (R) Right receiver (2) Low pass filter (3) Output terminal

Claims (3)

[Claims] (1) A stereo headphone sound field correction device characterized in that a means for weakening the sense of direction of bass sounds of stereo headphones is connected. (2) A sound field correction device for stereo headphones, characterized in that a means for creating crosstalk in the bass range is connected between the left and right channels of the stereo headphones as a means for weakening the sense of direction of the bass sounds of the stereo headphones. (3) The stereo headphone sound field correcting device according to claim (2), characterized in that a low pass filter (LPF) is connected between both the left and right channels as means for creating crosstalk in the low frequency range.