Specifications
Standard Parts
NO. |
Parts |
ZD-71 |
ZD-21 |
1 |
Console | ● |
● |
2 |
TDH-50 air conduction earphone | ● |
● |
3 |
B-71 bone vibrator | ● | ● |
| 4 | Built-in Sound Level Meter for Noise Monitoring (built-in) | ● | ● |
| 5 | External operation keyboard | ○ | ○ |
| 6 | Patient response button | ● | ● |
| 7 | HDA200 high frequency earphone | ○ | ○ |
| 8 | EAR-3A insert earphone | ○ | ○ |
| 9 | Amplifier System kit | ○ | ○ |
| 10 | Pediatric audiometry system kit | ○ | ○ |
| 11 | Pocket PC | ○ | ○ |
| 12 | Medical PC | ○ | ○ |
| 13 | Desktop PC | ○ | ○ |
| 14 | Printer | ○ | ○ |
| 15 | Loud speaker | ○ | ○ |
| 16 | Talk forward microphone | ○ | ○ |
| 17 | Monitor earphone | ● | ● |
| 18 | Talk back microphone | ● | ● |
| 19 | MDSP pediatric handheld speaker | ○ | ○ |
| 20 | Mobile workstation | ○ | ○ |
| Note： ● standard ○ operational × not available | |||
Function Modules
| NO. | Module | ZD-71 | ZD-21 |
| 1 | Pure tone audiometry | ● | ● |
| 2 | High frequency audiometry | ● | ○ |
| 3 | Speech audiometry | ● | ● |
| 4 | Sound field test | ● | ● |
| 5 | Pediatric audiometry | ○ | × |
| 6 | Built-in noise measurement | ● | ● |
| 7 | Patient management system | ● | ● |
| 8 | Automatic pure tone average calculation | ● | ● |
| 9 | Stimuli frequency step adjustment | ● | ● |
| 10 | Automatic masking alert | ● | ● |
| 11 | Speech testing scoring | ● | ● |
| 12 | Communication between doctor and patient | ● | ● |
| 13 | Retrocochlear hearing test battery | ● | ○ |
| 14 | Automatic air-bone gap calculation | ● | ○ |
| 15 | Automatic masking procedures | ● | ○ |
| 16 | Dynamic database for audiologic evaluation(DDAA) | ● | ○ |
| 17 | Print review | ● | ○ |
| 18 | Multi-language capabilities | ● | ● |
| Note： ● standard ○ operational × not available | |||
Unique Functions
Functions |
Descriptions |
Pure tone audiometry |
AC and BC testing for HTL, MCL, UCL,etc options for 3 types of transducers and 5 types of testing signals |
High frequency audiometry |
AC HTL,MCL,UCL etc |
Speech audiometry |
SRT,SDT,MCL,UCL,WDS, PIPB, Stenger |
Sound field test |
Sound field for HTL, MCL, UCL |
Pediatric Audiometry |
BOA, VRA,PA, |
Retrocochlear testing battery |
ABLB,MLB,Stenger,tone-decay,Weber,SISI |
Patient management system |
Record and retrieve patient information |
Case history |
Built-in case history and medical questionnaire. The recorded answers can be used for further analysis |
Built-in sound level meter |
Monitoring noises in the testing environments |
Automatic pure tone average calculation |
Automatically calculate the pure tone threshold averages at 500, 1000 and 2000 Hz or any other selected frequency groups |
Dynamic database for audiologic evaluation (DDAA) |
A specially designed data analysis program which can process all testing information according to the criteria |
Frequency step adjustment |
Adjust testing frequency to 1 Hz |
Test Signal Frequency&Intensity Range
Signal Output |
Frequency（Hz） |
Intensity（dB HL） |
Air conduction earphone |
125～8000 |
-10～120 |
Bone vibrator |
250～6000 |
-10～70 |
Insert earphone |
125～8000 |
-10～105 |
High frequency earphone |
8000～16000 |
-10～100 |
Sound field |
125～8000 |
-0～100 |
Technical Data
Parameters |
|
|
Frequency Adjustment Step |
Standard,1/2,1/3,1/6,1/12,1/24 octave |
|
Intensity Adjustment Step |
1dB、2dB、5dB |
|
Frequency Accuracy |
±0.2% |
|
THD |
Air conduction earphone |
≤2% |
Bone vibrator |
≤3% |
|
Sound Field |
≤3% |
|
Reference Equivalent Threshold Sound Pressure Level and Reference Equivalent Threshold Level Accuracy |
±3dB |
|
Hearing Level Controller Accuracy |
0.1 dB |
|