JPS6328185Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a helmet with a speaker, and more specifically, to a helmet with a speaker that has improved low-frequency characteristics.

In order to enable motorcycle riders to listen to stereo music, it is known that helmets are equipped with speakers. Helmet 1 as shown
A speaker unit 3 is embedded and attached to the earlobe facing portion of a cushion material 2 applied to the inside of the earlobe. The sound axis of this speaker unit 3 is aligned with the passenger's ear canal, and the sound axis of the speaker unit 3 is aligned with the passenger's ear canal.
Since the sound generated by the helmet is guided directly from the ear canal to the eardrum, you can enjoy reproduced sound that does not attenuate much of the high- and low-frequency sounds. Due to the low-frequency structure, the reproduced sound does not attenuate, but it has the disadvantage that the reproduced sound lacks low-frequency sound, and furthermore, the low-frequency sound is masked by road noise with a high level, resulting in a lack of low-frequency sound. I get used to the sound quality.

Therefore, this idea attempts to reproduce a sound field inside the helmet that does not lack low-frequency sounds, and for this purpose, the direction of the sound axis of the speaker unit located near the passenger's earlobe is aligned with the direction of the ear canal. Rather, it is characterized by its orientation being along a direction substantially perpendicular to the ear canal, and the speaker unit being located at a position behind the earlobe.

Next, one embodiment of the invention shown in FIG. 2 and subsequent figures among the attached drawings showing the structure of this invention will be described. First, in FIG. 2, reference numeral 10 indicates the helmet as a whole. A cushion material 12 is stretched on the inside of a plastic shell 11 forming the helmet, and a sight 13 is provided on the front side of the cushion material 12. A windshield 14 is attached.

When the motorcycle rider wears the helmet 10, the thickness of the cushion material 12 is reduced from a portion of the cushion material 12 facing the earlobe E to a portion slightly toward the rear, thereby forming a housing chamber 15 for the speaker unit. A speaker unit 16 is mounted in the housing chamber 15 at a portion located slightly rearward of the earlobe E so as to face forward of the passenger. In other words, the speaker unit 16 is positioned behind the earlobe, and its sound axis is approximately perpendicular to the ear canal.
A facing surface 15a corresponding to the inside of the housing chamber 15 is formed on the front surface of the speaker unit 16, and has a function of attenuating high-frequency components of the sound reproduced by the speaker unit.

Since the speaker-equipped helmet of this invention has the above-described configuration, when the speaker unit 16 is driven, the reproduced sound obtained by this has a low level of low-frequency sound, but among the components of the reproduced sound, the reproduced sound is of low quality. , high-frequency sounds are attenuated by the earlobe E, the cushion material on the surface 15a facing the speaker unit of the storage chamber 15, and the surrounding cushion material 12 before reaching the eardrum, which is the entrance to the human body's sense of hearing. Since the sound is not attenuated by the internal shape of the helmet 11 or the earlobe E, the sound pressure level of the entire reproduced sound has a flat characteristic.

If this state is represented by the frequency characteristic curve shown in Fig. 5 with reference to around 1KHz, the peak of high-frequency sounds will be relaxed, only a low peak will appear, and the overall sound will be flat. I understand.

As is clear from the above explanation, the speaker-equipped helmet of this invention is constructed so that the sound axis of the speaker unit is oriented in a direction substantially perpendicular to the ear canal and is positioned behind the earlobe. The high-frequency components of the reproduced sound are attenuated by the passenger's earlobes and the cushioning material inside the helmet, but the low-frequency components are less likely to be attenuated, so the overall level of the reproduced sound depends on the level of the high-frequency components. The resulting sound quality has a low and relatively flat characteristic, making it easy for motorcycle riders to hear.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a conventional helmet with speakers, Fig. 2 is a side view of the helmet with speakers according to this invention, Fig. 3 is a partially cutaway front view of the same, and Fig. 4 is along the line shown in Fig. 3. 5th cross-sectional view along
The figure is a sound pressure-frequency characteristic diagram of the speaker in the speaker-equipped helmet of this invention for comparison with a conventional product. 10... Helmet, 11... Ciel, 12...
...Cushion material, 13...Site, 14...Windshield, 15...Accommodation chamber, 16...Speaker unit.

Claims (1)

[Scope of utility model registration request] A helmet with a speaker that includes a speaker on the inside of the helmet, the helmet with a speaker having a speaker unit that is located behind the earlobe and faces forward.