JPH067396A - Soundproof ear cover - Google Patents

Abstract

PURPOSE:To inform a wearer of the soundproof ear cover of an alarm and sound pressure respectively exceeding regulated values while to prevent the use of the device in the state of not obtaining a desired soundproof effect by providing an electric circuit which triggers an alarm device in case of such excess at a proper point of the soundproof ear cover. CONSTITUTION:Soundproof material layers 2 consisting of synthetic resin sponge, etc., are internally mounted within cup-shaped sheaths 1 of the soundproof ear cover and cushion members 3 are mounted at the peripheral end edges of the cup-shaped sheaths 1. A microphone 4 which senses the sound pressure on the inner side of the soundproof ear cover is mounted to the inner side of the soundproof material layers 2. An alarm buzzer 5 and alarm lamp 6 as well as the electric circuit 7 and power source battery 8 both of which compare the electric signal from the microphone 4 with a reference value for comparison and trigger the alarm buzzer 5 and the alarm lamp 5 when the level thereof exceeds the reference value for comparison are disposed between the cup-shaped sheaths 1 and the soundproof material layer 2.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to soundproof ear covers.

[0002]

A person who works in a noisy place such as an airport uses a soundproof ear cover in order to avoid noise or to prevent hearing damage (such as hearing loss) from the noise. The conventionally known soundproof ear covers are quite effective as a soundproofing tool if they are used by mounting them so that noise does not directly enter the ears. If there is a gap between your head and
There is a drawback in that noise enters the soundproof ear covers directly through the gaps and the soundproofing effect is significantly reduced, so that the desired effect cannot be achieved. An object of the present invention is to provide a person who wears the soundproof earmuffs (and the surroundings) with an alarm sound or an alarm sound and a warning light when the soundproof earmuffs are not properly attached and there is a gap between the soundproof earmuffs and the head. By notifying the person of that fact, it is to prevent wearing and use in a state where the intended soundproofing effect is not obtained.

[0003]

[Means for Solving the Problems] A sound pressure sensor such as a microphone is attached to the inside of the soundproof ear cover, and an alarm device including an alarm buzzer, a warning light, etc., and a sound pressure sensor such as a microphone are installed at appropriate places of the soundproof ear cover. An electric circuit for activating the alarm device when the sensor detects a sound pressure above a specified value.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 of the accompanying drawings is a cutaway front view of an essential part of an embodiment of a soundproof ear covering according to the present invention. In the figure, reference numeral 1 is a cup-shaped outer cover of a soundproof ear covering. A sound-insulating material layer 2 made of a synthetic resin sponge or the like is provided inside the cup-shaped outer cover 1 in the same manner as a conventionally known sound-proof ear covering, and a peripheral edge of the cup-shaped outer cover is mounted on the wearer's head at the time of mounting. A cushion member 3 is attached to be in close contact with the portion. A microphone 4 for detecting the sound pressure inside the soundproof ear covers is attached inside the soundproof material layer 2, and an alarm buzzer 5 and a warning light 6 are provided between the cup-shaped jacket 1 and the soundproof material layer 2. ,, microphone 4
An electric circuit 7 for activating the alarm buzzer 5 and the alarm lamp 6 when the level of the electric signal from the device is compared with a comparison reference value and the level exceeds the comparison reference value, and a power supply battery 8 are arranged. In the figure, 9 is an alarm sound passage of the alarm buzzer 5, and 10 is a headband for wearing which holds the left and right soundproof ear covers in a linked manner. The cup-shaped jacket is made of synthetic resin material or cloth.

In the soundproof earmuff described above, there is a gap between the cushion member 3 and the outer surface of the head when the earpiece is worn and used, and the sound pressure (noise level) in the soundproof earmuff exceeds the specified value. When the electric signal level rises and the electric signal level sent from the microphone exceeds the comparison reference value, the buzzer 5 and the alarm 6 etc.
Is activated, and informs the user who wears the soundproof ear covers and others around him / her that he / she is not wearing it.

In the above embodiments, the microphone is used as the sound pressure sensor, but it goes without saying that other sound pressure sensors can be used.

[0007]

In the soundproof earmuffs according to the present invention, when the wearing is bad, the buzzer is sounded, or the buzzer is sounded and an alarm lamp is lit at the same time to immediately notify that fact. The user can avoid using the soundproof ear covers in a state where the soundproofing effect is lowered.

[Brief description of drawings]

FIG. 1 is a cutaway front view of an essential part showing an embodiment of a soundproof ear covering according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cup-shaped jacket 2 Soundproof material layer 3 Cushion member 4 Microphone 5 Alarm buzzer 6 Warning light 7 Electric circuit 8 Power battery 10 Headband

Claims (1)

[Claims] 1. A sound pressure sensor such as a microphone is attached to the inside of the soundproof ear cover, and an alarm device including an alarm buzzer, a warning light, etc. and a sound pressure sensor such as a microphone are provided at appropriate places of the soundproof ear cover. A soundproof earmuff provided with an electric circuit for activating the alarm device when a sound pressure exceeding a value is detected.