Maico MA 53 Operating Instructions Manual

Contents

Maico MA 53 Operating Instructions Manual Manual pdf 38 page image

Operating Instructions MA 53Geba_MA53_e_13a.doc 36 851 430/3 11/117 Advanced features7.1 Complex mixingThe complex mixing feature of the MA 53 allows the operator to route twodifferent test signals to the same ear. The test signals and the test levels areindependently adjustable but will be presented to one ear (ipsilateral). Thisfeature could be used to test with speech in noise, competing message tests,tone on noise or several othercombinations.- To enter the complex mixing press theswap key  longer than 2 seconds.- The LCD-display  shows the mixingselections (see picture 38).- Use the left frequency up key  to switch on the mixing for the left ear andthe right frequency up key → for the right ear.- Picture 39 shows i.e. the LCD-display forenabled mixing on the left ear.- Store the selection by pressing the STIMbar  or ↔.- The LCD-display  now shows the actualsetting for mixing. In the example picture40 is a pure tone with a level of 30 dBHLand a narrow band noise with a level of 30dBHL, both with a frequency of 1000 Hz,presented to the left ear.Adjust hearing level and the test signalindependently for both channels. Bothsignals will be mixed and presented to the left ear.You can also select other receivers like BC, FF or insert phone for the left earwith the left receiver selector key .Other possible selections are mixing with presentation to the right ear or toboth ears.To exit the complex mixing press the swap key  longer than 2 seconds andswitch the mixing for the left and the right ear to the off position.Picture 38 MA 53 display withmixing selection screenPicture 39 MA 53 display withmixing selection for the left earPicture 40 MA 53 display withselected mixing for the left ear