Directions for Use.

Fig. 1 represents the natural position of the Audiphone, in which position it is carried (by gentlemen) by attaching it by means of a hook or button to the vest or inside of the coat, where it will be convenient for use and fully concealed. The shape and flexibility of the disc render the Audiphone an excellent fan.

Fig. 2 represents the Audiphone in tension and ready for hearing. It is put in this position by means of the silken cords which are attached to the disc, and which pass down as a single cord under the "wedge" in the handle. By opening the wedge (as seen in Fig. 3) the cord, which now moves freely, should be drawn down until the disc is brought to the proper tension (as seen in Fig. 2) when the wedge is closed and the instrument is held in the position required. Experience will regulate the exact tension needed for each person, and also the tension necessary for different voices, music, distant speaking, etc. In this respect the Audiphone is adjusted to suit sound as an opera glass is adjusted to suit distance.

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Fig. 3 represents the position in which the Audiphone should be held for hearing. It should be held loosely in the hand and its upper edge should be placed in easy contact, by a slight pressure, against one or more of the upper teeth, that are the most convenient. In many instances the "eye teeth" give the best results, but a little practice will soon determine the best for hearing. The lower teeth should not come in contact with the Audiphone, nor should the Audiphone be pressed beyond the point of tension at which it has been adjusted, as seen in Fig. 2