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Description 1 Title of Invention
Phase difference headphones
3. Detailed Description of the Invention The present invention is a phase contrast headphone
designed to produce a direct sound wave having a phase difference necessary for sensing the
direction of a sound source by an air circuit provided inside the headphone. A circuit is provided
to create a sound wave having a phase difference corresponding to an indirect sound, and by
adding this, the sound source is given a sense of distance, and a stable sound image can be
obtained out of the head. It is a phase difference headphone, and the structure will be described
as follows by way of example. The headphone p housing 1 is configured in a shape (the left and
right housings have a symmetrical structure) including an air circuit 2 having a short large
diameter by an exponential curve and a long air circuit 3 having a spiral small diameter inside
thereof. A speaker unit 4.4 '(hereinafter, referred to as a speaker unit as a unit) and a unit 5.5',
respectively (1. As shown in FIG. 2, the mounting units 4 and 5 ', and the units 5 and 4' are
connected in parallel to the left and right of the stage 7 as shown in FIG. With such a
configuration, the listeners are given direct sounds with the units 4 and 4 'and with the phase
difference between the units 5 and 5', respectively, to both ears. Can sense the direction of the
sound source, but the sound waves emitted from the back of the diaphragm of the left and right
units 5.5 'directly enter the sound air circuit 2 via the spiral air circuit 3 and sound waves with a
phase delay Directly to the sound as it reaches the ear, the sound wave of this phase difference
acts almost the same as the indirect sound in the sound field in the room EndPage: 1 with the
speaker as the sound source, and can sense the sense of distance, This makes it possible to
obtain a more stable sense of out-of-head localization. In this embodiment, the indirect sound
uses the units 5, 5 'as a sound source, but other units 4, 4' may be used. According to the
embodiment, in order to give a phase difference capable of sensing the direction to the direct
sound, an air circuit length of about 100 may be sufficient, whereby the sense of localization of
the sound image outside the head can be obtained, but the indirect sound providing a sense of
distance is The air circuit can be made more than 250 inches, and by adding this, a more stable
sense of out-of-head localization can be obtained. The direct sound is assumed to have the same
sound pressure level. As described above, the phase difference headphone according to the
present invention physically generates direct sound and indirect sound having phase difference,
so that it is possible to obtain stable sound with a simple structure without requiring any
electrical signal delay device or the like. Sound localization as in conventional headphones, no
sense of oppression due to separation of left and right sounds, no fatigue even when used for a
long time because there is no discomfort, and improvement of sound quality known as synergy
effect by two speakers In addition to normal stereo listening, for example, it is possible to obtain
effective headphones suitable for a wide range of applications such as learning of languages,
learning of electronic music, monitoring of studios, telephone exchange and the like.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an embodiment of a
phase difference headphone according to the present invention, and FIG. 2 is a wiring diagram,
the left and right headphones have a symmetrical structure, and the figure shows a right
headphone Show. 1 is a headphone housing, 2 is a direct sound air circuit, 3 is an indirect sound
air circuit, 4 ° 4 'and 5, 5' are speaker units, 6 is a stereo source, 7 is an earpiece butt, 8 is an
opening It is a net. Patent Assignee 1) Rei 46, \ EndPage: 2
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