TECHNICAL FIELD

Embodiments described herein relate to an earset, and more particularly, to an inner microphone capable of transmitting sounds heard from a user's ear and an earset having the inner microphone.

BACKGROUND

Generally, an earset is a piece of equipment that combines an earphone with a microphone, for sending and receiving audio signals, which is connected with wires or wirelessly to an electronic device. The earset is usually equipped with a sound reproducer that is inserted into a user's ear and a microphone that is fitted as close to the user's mouth as possible, for transmitting sounds emitted by the user. Such a configuration is problematic in that external noise intrudes into the microphone in a noisy environment, and that, when the user moves their body, the microphone will judder, thus making it difficult to transmit sound clearly.

To solve this problem, a technology disclosed in Korean Patent Registration Publication No. 10-1762671 was developed which feeds a user's voice coming through the Eustachian tube in the user's ear into the microphone.

FIG. 1is a view showing an earset having an inner microphone according to the conventional art. A housing10comprises a mounting space11in which components are mounted and an insertion tube12that is inserted into the external auditory canal. An earbud of elastic material may be detachably attached to the insertion tube12so as to fit comfortably in the user's ear. Components including a sound reproducing unit20such as a microspeaker, an inner microphone30for receiving audio signals of the user, and a control board (not shown) for controlling these components may be mounted in the mounting space11. The sound reproducing unit20emits sound to the insertion tube12to direct the sound into the user's ear, and the inner microphone30receives the user's voice from the insertion tube12. To facilitate the mounting of the sound reproducing unit20and the inner microphone30, a bracket40is mounted in the mounting space in the housing10, with the sounding producing unit20and the inner microphone30assembled on the bracket40. The bracket40corresponds in shape to the housing10, and comprises a lower housing41in which the sound reproducing unit20is mounted and a microphone housing42mounted on the lower housing41at one side of the sound reproducing unit20. The inner microphone30is mounted on the microphone housing42.

However, the earset according to the conventional art is problematic in that external noise may be still transmitted to the microphone through a back hole22intended to make it easy to vibrate a diaphragm provided in the sound reproducing unit20. For this reason, the back hole22in the sound reproducing unit20is made small in size, usually 0.04 mm or less. As such, the diaphragm of the sound reproducing unit20does not have enough vibration force at low frequencies, which can result in a reduction in sound pressure.

SUMMARY

Embodiments described herein provide an earset capable of preventing external noise from being transmitted through an inner microphone.

According to one embodiment, there is provided an earset having an inner microphone, the earset comprising: a housing that defines a mounting space in which components are mounted, forms the exterior, and has a sound emitting hole; a sound reproducing unit mounted in the mounting space, for emitting sounds; the inner microphone mounted in the mounting space; and a duct mounted in the housing, for transmitting sounds coming through the sound emitting hole to the inner microphone.

In some embodiments, the housing may comprise an insertion tube that is inserted into the external auditory canal and serves as a sound emitting hole.

In some embodiments, the earset may further comprise a chamber forming a closed space that surrounds the inner microphone, wherein the duct may be formed in the chamber to transmit sounds coming through the insertion tube to the inner microphone.

In some embodiments, the chamber may comprise an upper bracket for fixing the inner microphone into the mounting space and a lower bracket that interlocks with the upper bracket to form a space.

In some embodiments, the sound reproducing unit may be mounted between the upper bracket and the lower bracket, and the closed space surrounding the sound reproducing unit and the mounting space for the inner microphone may be separated from each other.

In some embodiments, the housing may have a back hole communicating with the rear of the sound reproducing unit.

In some embodiments, the earset may further comprise one or more brackets mounted between the sound reproducing unit and the housing, for tuning the acoustics.

In some embodiments, the duct may extend into the sound emitting hole.

Embodiments also allow for picking up sounds transmitted from the user's ear more clearly by preventing external noise from entering the sound reproducing unit.

Another advantage of the embodiments described herein is to avoid a muffled sensation caused by a pressure difference by employing an open-type structure in the housing of the earset.

A still another advantage of the embodiments described herein is to prevent external noise from entering the inner microphone by having a chamber for closing off the rear of the inner microphone.

Those skilled in the art will recognize additional features and advantages upon reading the following detailed description, and upon viewing the accompanying drawings.

