Maico MA 42 Service Manual

Service Manual MA 42
D-0125965 Rev. D
39
18/05/2022
AUDIOMETRY
Patient Response
Switch
One push button
Patient
communication
Talk Forward
Masking Signals
Narrow band noise masking for tone: IEC 60645-1 2012, 5/12
Octave filter with the same center frequency resolution as pure tone
White Noise: 80 Hz to 20 kHz measured with constant bandwidth
Speech Noise for speech: IEC 60645-2:1993 125 Hz to 6 kHz
falling 12 dB/octave above 1 kHz (+/-5 dB)
Tone: Effective Masking: ISO 389-4, ANSI S3.6
Speech: Selectable effective masking or SPL
Air Conduction
DD45
RadioEar Standard Values
DD65v2
RadioEar Standard Values
IP30
ISO 389-2, ANSI S3.6 (no free-field filter applicable)
DD450
RadioEar Standard Values
HDA 300
Sennheiser Standard Values
Holmco
9501
Only for Masking with BKH10
(no free-field filter applicable)
Bone Conduction
B71/B81
ISO 389-3, ANSI S3.6, Mastoid Placement
(no free-field filter applicable)
BKH10
ISO 389-3, ANSI S3.6, Mastoid Placement
(no free-field filter applicable)
Sound Field
SP90A
ISO 389-7, ANSI S3.6
SP90
ISO 389-7, ANSI S3.6
SP85A
ISO 389-7, ANSI S3.6
AP70 FF
Amplifier
ISO 389-7, ANSI S3.6
Measured in free-field conditions
Transducers –
Headband
tension
DD45
Headband Static Force 4.5 N ± 0.5 N
DD65v2
Headband Static Force 10 N ± 0.5 N
DD450
Headband Static Force 10.0 N ± 0.5 N
HDA 300
Headband Static Force 8.8 ± 0.5 N
B71/81
Headband Static Force 5.4 N ± 0.5 N
BKH10
Headband Static Force 5.4 N ± 0.5 N
(5.0 N ± 0.5 N if attached to Holmco 9501 headband)
Frequency Response (performed with pink noise)
Headphones +
Insert
earphones
Frequencies
IEC 60645-1
ANSI S3.6
125 Hz
+ 4 dB/-11 dB
+0 dB/-10 dB
250 Hz to 4000 Hz
±4 dB
±3 dB
6000 Hz to 8000 Hz
+4 dB/-6 dB
±5 dB
Bone Conductor
Frequencies
IEC 60645-1
ANSI S3.6
250 Hz to 4000 Hz
+/- 10 dB at 1mW
+/- 10 dB at 1mW

Maico MA 42 Specifications

General

Brand	Maico
Model	MA 42
Category	Medical Equipment
Language	English