| 摘要 |
PCT No. PCT/AT89/00013 Sec. 371 Date Oct. 25, 1989 Sec. 102(e) Date Oct. 25, 1989 PCT Filed Feb. 15, 1989 PCT Pub. No. WO89/07818 PCT Pub. Date Aug. 24, 1989.In an apparatus for voice training, on several points of a student's body measuring devices are provided, which are connected to optical display devices. At each of these measuring devices, a pressure sensor amplifier is connected with an analog multiplexer, and a sound-pressure measuring device is directly connected to the respective display device.
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