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Operating Instructions MA 41

8100456_OI_MA41_EN_15a 17 8100456-8 04/15

Adjust the level of the masking noise by the right-hand level control dial. If the

Store button on either side of the instrument is pressed, the hearing threshold

value will be stored in the audiogram with the corresponding masking symbol.

The masking sound should be continuously presented for effective masking by

pressing the STIM button. You can interrupt the masking signal by pressing the

corresponding stimulus button (2).

Automatic Masking

With the manual masking, as described before, the masking level should be

adjusted every time you change the test signal level. The MA 41 has a tracking

function for easy masking.

Set the tone level and the masking level to a desired difference for effective

masking. Press the TRACK button (14) to implement the automatic masking

feature. The masking level is automatically changed if you adjust the test signal

level (e.g. if the test level is at 30 dB

and the masking level 50 dB

and you

change the test level to 45 dB

the masking level will automatically adjust to

65 dB

5.1.2 Bone Conduction Testing

Place the bone conduction oscillator so that the flat, circular side of the

transducer is placed on the mastoid, at the noticeable ledge of the cranial bone

behind but not touching the pinna. The other side of the headband is placed

in front of the opposite ear. Set the receiver selector to Bone and select the

testing ear.

Figure 6 - Tone Audiometry with Masking

Maico MA 41 Operating Instructions

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