JPS6340947Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an in-vehicle speaker device, and particularly relates to an improvement of a so-called stationary speaker device that is fixed to a rear percent tray.

Conventionally, speaker systems fixed to rear percent trays have often been of the closed type or of the bass reflex type with a bass report on the front of the cabinet.

However, the bass reflex type was designed to improve bass reproduction ability, and had the drawback of lacking a sense of realism since only the direct sound was heard in the middle and high frequencies.

Therefore, this idea is to radiate the sound emitted from the back of the diaphragm of at least one speaker (excluding the bass speaker) through a duct through a sound emitting hole formed on the back of the speaker cabinet, and then reflect it off the rear glass of the car. By increasing the playback level, the reproduction level of medium and high frequency sounds is enhanced, and the reflected sound volume is increased to enable reproduction with a rich sense of presence.Examples will be described in more detail below.

In FIGS. 1 and 2, reference numeral 1 denotes a cabinet with a bass speaker 2 on the front surface 1a, and at least one speaker 3 that reproduces a frequency band higher than that of the bass speaker 2 (in the figure, a treble speaker 2 is installed). ) constituting a way speaker system is attached, and furthermore, a sound emitting hole 4 is bored in the rear surface 1b of the cabinet 1.

Inside the cabinet 1, a duct 5 is provided for guiding sound waves emitted from the back surface of the diaphragm of the high-pitched speaker 3 to the sound emitting hole 4.

When such a speaker device is placed on the rear parcel tray 6 as shown in FIG. The sound from the back of the high-pitched speaker 3 is reflected by the rear glass 7 and radiated forward, resulting in an increase in the sound pressure level and an increase in reflected sound components, making it possible to listen to reproduced sound with a rich sense of presence.

As explained above, this invention is a speaker device attached to a rear parcel tray, which includes a bass speaker, at least one speaker that reproduces a frequency band higher than the reproduction frequency band of the bass speaker, and the speaker. An in-vehicle speaker device comprising: a cabinet mounted on the front and having a sound emission hole on the rear; and a duct for guiding sound waves emitted from the rear surface of the diaphragm of at least one speaker other than the bass speaker to the sound emission hole. The sound waves emitted from the sound emitting holes are reflected by the rear windshield of the car and radiated forward, increasing the acoustic energy in the high frequency range and increasing the reflected sound volume, resulting in highly immersive playback. It has the advantage of being possible.

Although this invention has been described for a case where it is applied to a 2-way speaker system, it can of course also be applied to a 3-way speaker system comprising a bass speaker, a mid-range speaker, and a treble speaker. This can be applied to only the high-pitched speaker, only the mid-range speaker, or both the mid-range speaker and the treble speaker, and the same effect can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the in-vehicle speaker device of this invention, FIG. 2 is a sectional view of the same, and FIG. 3 is a sectional view showing the in-vehicle speaker of this invention installed in the rear parcel tray of a car.

Claims (1)

[Scope of utility model registration request] A speaker device fixed to a rear parcel tray, comprising a bass speaker, at least one speaker that reproduces a frequency band higher than that of the bass speaker, and the speaker is attached to the front and emits to the rear. 1. A vehicle-mounted speaker system comprising: a cabinet having a sound hole; and a duct for guiding sound waves emitted from the back surface of a diaphragm of at least one speaker other than the bass speaker to the sound emission hole.