General instructions for using the LED Matrix KA450

The LED matrix is used to conveniently transfer the determined hearing threshold values to an audiogram form in accordance with DIN 45627. The illuminated dot shines through the audiogram form and can be transferred to the form using a fiber-tip pen. The form sheet is placed on the matrix using the two centering aids (45). For sound audiometry, the illuminated dot of the matrix is always in the position of the output level control or the frequency as indicated in the LCD display. For speech audiometry, the illuminated dot is also in the position of the output level control, but the frequency axis is fixed at 2KHz.