Method of customizing speaker for hearing protection earcup
First Claim
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1. A method comprising:
- selecting an amplifier with a maximum output;
selecting a speaker with respect to tile selected amplifier, wherein the combination of the speaker and the selected amplifier maximum output provides a maximum speaker output which is precisely limited to a desired cap level without undershooting the desired cap level;
electrically coupling the amplifier directly to the speaker; and
placing the speaker and the amplifier in a hearing protection earcup, wherein the earcup provides a range of 20-30 noise reduction rating (NRR) and has between 100,000 to 300,000 cubic millimeters of air space volume behind the speaker, wherein the air space volume behind the speaker is configured to ensure effective passive NRR.
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Abstract
Embodiments relate generally to methods for customizing speakers in hearing protection earcups in conjunction with an amplifier so that the maximum speaker output may be capped, for example to acceptable OSHA or other such standards. By customizing such speaker(s), the maximum speaker output may be set precisely at the desired cap level. Thus, hearing may be protected, while also ensuring that maximum speaker output will not undershoot the desired cap level (which might negatively affect performance).
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Citations
19 Claims
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1. A method comprising:
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selecting an amplifier with a maximum output; selecting a speaker with respect to tile selected amplifier, wherein the combination of the speaker and the selected amplifier maximum output provides a maximum speaker output which is precisely limited to a desired cap level without undershooting the desired cap level; electrically coupling the amplifier directly to the speaker; and placing the speaker and the amplifier in a hearing protection earcup, wherein the earcup provides a range of 20-30 noise reduction rating (NRR) and has between 100,000 to 300,000 cubic millimeters of air space volume behind the speaker, wherein the air space volume behind the speaker is configured to ensure effective passive NRR. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10)
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3. The method of claim wherein the maximum speaker output is limited to 85dB.
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4. The method of claim I, wherein the maximum speaker output is limited to precisely 85dB.
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11. A hearing protection device comprising:
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an earcup operable to provide hearing protection from an external noise environment; a speaker within the earcup, wherein the earcup has between 100,000 to 300,000 cubic millimeters of air space volume behind the speaker, wherein the air space volume behind the speaker is configured to ensure effective passive NRR; and an amplifier in direct electrical connection with the speaker, wherein the amplifier drives the speaker; wherein the speaker has electrical resistance, and the speaker and amplifier combined are operable to provide a maximum speaker output which is limited to precisely a desired cap level. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification