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This page displays all 「FI」 in main group H04R27/00. |
HB:Handbook | ||||
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CC:Concordance | |||||
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Public address systems (circuits for preventing acoustic reaction H04R 3/02) | HB | CC | 5D023 | |
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Public address system structure; microphone/speaker layout | HB | CC | 5D023 | |
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Control of the public address system | HB | CC | 5D023 | |
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.Start, stop, change-over | HB | CC | 5D023 | |
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.Sound volume | HB | CC | 5D023 | |
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.Sound quality | HB | CC | 5D023 | |
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used at a particular location | HB | CC | 5D023 | |
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.Transportation systems or facilities, e.g. train and station, road, car and road, car and tunnel | HB | CC | 5D023 | |
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..in a vehicle, e.g. bus, train, elevator | HB | CC | 5D023 | |
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.in a building, e.g. conference room, shop | HB | CC | 5D023 | |
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Others | HB | CC | 5D023 | |
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.Amplifying systems for the deaf | HB | CC | 5D023 | |
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.Electric megaphones | HB | CC | 5D023 | |
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Structure | HB | CC | 5D023 | |
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.Parts layout | HB | CC | 5D023 | |
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Circuit configuration | HB | CC | 5D023 | |
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having another function (radio, lighting, etc.) | HB | CC | 5D023 | |
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Others | HB | CC | 5D023 | |