Noise protection verification device
DCFirst Claim
1. Ear protecting device comprising:
- a sealing section (2) for acoustically sealing the meatus (3) of a human;
a sound generator;
an electronics unit (E3) connected to supply a predetermined signal to the sound generator (SG);
the sound generator (SG) having a sound outlet (SSG) directed toward the user meatus (3) and generating a resulting sound field in the meatus (3) in response to the supplied predetermined signal;
an inner microphone (M2) with a sound inlet (S2) directed toward the meatus (3), arranged for measuring the resulting sound field in the meatus (3);
the inner microphone being connected to the electronics unit (11,E3), the electronics unit comprising a sound analyser coupled to said inner microphone (M2) for analyzing sound characteristics of the resulting sound field in the meatus (3), and producing analyzed sound characteristics;
storing unit in the electronics unit (11,E8,E9,E10) providing storage of measured predetermined sound characteristics of a properly functioning ear protecting device;
a comparing unit in the electronics unit (11,E3) comparing the inner microphone (M2) analyzed sound characteristics with the stored measured predetermined sound characteristics; and
indicating unit coupled to said comparing unit (11,E3) the indicating unit being activated if said analyzed sound characteristics differ significantly from said predetermined sound characteristics.
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Abstract
Ear protecting device with a sealing section for acoustically sealing the meatus of a human, includes a sound generator with a sound outlet for being directed toward the user meatus; an inner microphone with a sound inlet from the meatus, arranged for measuring the resulting sound field in the meatus; connected to an electronics unit including a sound analyser coupled to the inner microphone, for analyzing sound characteristics of the resulting sound field in the meatus, producing analyzed sound characteristics; storing part in the electronics unit for storing measured predetermined sound characteristics of a properly functioning ear protecting device; a comparing part in the electronics unit for comparing the inner microphone analyzed sound characteristics with the stored measured predetermined sound characteristics; indicating part coupled to the comparing part for being activated if the analyzed sound characteristics differ significantly from the predetermined sound characteristics.
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Citations
14 Claims
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1. Ear protecting device comprising:
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a sealing section (2) for acoustically sealing the meatus (3) of a human;
a sound generator;
an electronics unit (E3) connected to supply a predetermined signal to the sound generator (SG);
the sound generator (SG) having a sound outlet (SSG) directed toward the user meatus (3) and generating a resulting sound field in the meatus (3) in response to the supplied predetermined signal;
an inner microphone (M2) with a sound inlet (S2) directed toward the meatus (3), arranged for measuring the resulting sound field in the meatus (3);
the inner microphone being connected to the electronics unit (11,E3), the electronics unit comprising a sound analyser coupled to said inner microphone (M2) for analyzing sound characteristics of the resulting sound field in the meatus (3), and producing analyzed sound characteristics;
storing unit in the electronics unit (11,E8,E9,E10) providing storage of measured predetermined sound characteristics of a properly functioning ear protecting device;
a comparing unit in the electronics unit (11,E3) comparing the inner microphone (M2) analyzed sound characteristics with the stored measured predetermined sound characteristics; and
indicating unit coupled to said comparing unit (11,E3) the indicating unit being activated if said analyzed sound characteristics differ significantly from said predetermined sound characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
an outer microphone (M1) for picking up acoustic signals from the space outside of the ear; - and
an electronic unit (11,E3) including filtering means coupled to said inner microphone (M2) for filtering the signal from said inner microphone (M2), said filtering means being programmable to transform the signals based on the sounds received in the ear by said inner microphone (M2) into sounds having essentially the characteristics of spoken sounds of the wearer of the ear protecting device.
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14. Ear protecting device according to claim 13, comprising a connection interface (13,E12) for transmitting the filtered signal from the ear protecting device.
Specification