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December 1938


Arch Otolaryngol. 1938;28(6):999-1000. doi:10.1001/archotol.1938.00650041012010

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The value of the oscillographic tracing in the study of vocal characteristics is well known, but the acquisition and management of the equipment appear to create a rather formidable problem for one who has little familiarity with such apparatus.

Today the microphone and the public address system are so commonly seen that they are seldom noticed. The cathode ray oscillograph is now in common use in practically every well equipped radio repair shop. The combination of these instruments with a good miniature camera is all that is necessary for the making of excellent tracings.

The purpose of this brief paper is to point out that any physician can, with the cooperation of a skilled radio repair man, experiment in this work at nominal cost.

Figure 1 shows the arrangement of the apparatus; figure 2 shows tracings of the soprano voice with two different degrees of laryngeal pressure.

The following is

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