MODERN SLEEP-LEARNING: Page 110

is also available, which operates as an under the pillow speaker, but sets up audible vibrations that will be carried to your ears at any reasonable distance from the speaker. Any model of tape recorder may be used. However, an organization of sleep-learning researchers is preparing equipment which has been designed specifically the recording is not as it should be, simply record over the unwanted portion, for sleep-learning. The automatic electric timer is essential to sleep-learning, for it sets the tape machine to switch on and off automatically while the learner sleeps. Without it, modern sleep-learning would be impossible, for the student would be required to be awake to switch the mechanism on and off. The timers simply plug into a wall outlet, and the recorder is plugged into the timer. Beginners are reminded to hold the microphone about ten inches from the mouth and to speak in a normal, assured, positive voice when recording. It is advised that the recording level be monitored or checked immediately to determine the clarity. One distinct advantage of tape is the lack of added expense for errors. If The advertising industry must be thanked for the development of the endless tape cartridge. These were originally devised to repeat sales messages over and over. Cartridges offering a mobius loop are coated on both sides and offer twice the recording and playback time. For sleep-learning it has been found that the speed of 17/8 IPS (inches per second) is the most practical. This