In presenting this new type of audiometer designed for a specific purpose I claim no credit for its technical development beyond the fact that early this year I pointed out to Mr. R. E. Allison, the electroacoustic engineer of a company manufacturing a widely distributed audiometer for diagnostic use, that there exists a large potential demand for a simple, well constructed, pure tone audiometer which could be sold at a low price, especially designed for individually testing the hearing of large groups, particularly school children.
His response was surprisingly prompt. Within three weeks he produced this instrument, known as the maico D-6 school audiometer.
It is a pure tone audiometer with a high grade dynamic receiver. Its operating range is from 128 to 8192 cycles at fixed intervals of one octave with intensities variable in steps of 5 decibels (table).
It is accurately calibrated and practically meets as nearly as
NEWHART H. A NEW PURE TONE AUDIOMETER FOR SCHOOL USE. Arch Otolaryngol. 1938;28(5):777–779. doi:10.1001/archotol.1938.00650040789008
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