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Audiometer ZADO-A11 offers a broad test intensity range from -10 to 120 dB for air conduction and -10 to 70 dB for bone conduction. A built-in microphone with adjustable strength from 0 to 50 facilitates clear communication between the tester and the subject. Its modern LCD display provides clear, accurate numerical readings, allowing practitioners to monitor and adjust settings with ease. Our product is a reliable, internationally compatible solution for modern audiology practices.
| Test Intensity Range | Air conduction: -10 to 120 dB Bone conduction: -10 to 70 dB |
| Microphone | Built-in microphone; adjustable strength (0 to 50) for communication with tester |
| Channels | Two independent output channels |
| Frequency | Air conduction: 125 to 8000Hz Bone conduction: 250 to 6000Hz Error: ±2% |
| Masking Intensity Range | -10 to 110 dB |
| Test Signal | Pure tone, Pulse, Warble tone, Narrow band noise |
| Display Screen | LCD display, precise numerical display |
| Display Screen | LCD display, precise numerical display |
| Accuracy | Continuous attenuation; step: 5 dB; error: 1 dB |
| Masking | Air and Bone conduction contralateral masking |
| Protection Function | Protects tester’s hearing from damage |
| Power Supply | AC 100 to 240V, 50/60Hz, 30VA |
| Weight | 2.44 kg |
| Distortion Factor | Air conduction: less than 2.5% Bone conduction: less than 5.5% |
| Size | 430 × 110 × 300 mm |
Dual Independent Output Channels
Wide Frequency Coverage
High-Resolution LCD Display
Low Distortion Output
Multi-Mode Test Signals
Fine Attenuation Control
Hearing Protection Function
Optional Sound Field Output
Compact and Lightweight Design
Multilingual Interface
| Accessory | Quantity |
| Air conduction Headset | 1 pc |
| Bone conduction headset | 1 pc |
| Transponder | 1 pc |
| Power cable | 1 pc |
| USB data cable | 1 pc |
| USB software | 1 pc |
| Audiogram | 1 pc |
Audiometer ZADO-A11 is ideally suited for comprehensive audiometric evaluations in ENT clinics, occupational health screenings, pediatric assessments, and hearing aid fittings, offering precision, flexibility, and clinician-friendly operation.
Frequently Asked Question
Digital Signal Processor: 32-bit floating point processing at 192kHz sampling rate Frequency Synthesis: Direct digital synthesis (DDS) with 0.01Hz resolution Intensity Control: 24-bit digital attenuator with 0.1dB steps (±0.3dB accuracy) Waveform Purity: <-80dB harmonic distortion (fundamental at 70dB HL)
Platform Method: Calculates minimum effective masking levels Overmasking Prevention: Uses interaural attenuation database: Air: 40dB (TDH-39), 70dB (inserts) Bone: 0dB (direct conduction) Automatic Masking Noise: NBN with 1/3 octave bandwidth centered on test frequency
Daily: Biological listening check (1kHz/40dB) Transducer connection verification Weekly: Coupler measurements (ANSI S3.7) Harmonic distortion analysis Quarterly: Linearity verification (10dB steps) Frequency response check Annual: Full metrological calibration (NIST-traceable)
Connect to 6cc coupler (air) or artificial mastoid (bone) Set reference microphone at 1kHz/70dB Verify: Intensity accuracy (±1dB) Frequency accuracy (±2%) Distortion (<3% for air, <6% for bone)
Chassis: Aluminum alloy with EMI shielding Display: 5" LCD with 800×480 resolution Controls: Membrane keypad with 1M cycle rating Cooling: Passive convection (no fans)
Frequency Range: 125 Hz – 12,000 Hz (1/6 octave steps) Intensity Range: -10 dB HL to 120 dB HL (1 dB steps) Accuracy: ±1 dB (ANSI S3.6-2018 compliant)
Insert Earphones: ER-3A compliant (for air conduction) Supra-aural Headphones: TDH-39/49 (with cushion replacements) Bone Vibrator: B71 (mastoid placement) Free Field Speakers: For sound field testing
Automatic Transducer Calibration: Built-in daily biological calibration check Real-Time Monitoring: Detects transducer placement errors Ambient Noise Compensation: Adaptive masking based on environmental noise
Pure-Tone Audiometry (PTA): Air & bone conduction Speech Audiometry: SRT, SDS, MCL testing High-Frequency Audiometry (HFA): Up to 16 kHz (optional) Tympanometry Integration: With compatible middle ear analyzer
Dimensions: 30 × 25 × 10 cm Weight: 3.2 kg (with battery) Battery Life: 8+ hours (fast-charging in 2 hours) IP Rating: IP42 (dust & splash resistant)
Internal Storage: 5,000+ patient records Export Formats: PDF, CSV, HL7 (EMR integration) Connectivity: USB-C, Bluetooth 5.2, Wi-Fi 6
Daily: Biological listening check Monthly: Electroacoustic verification Annual: Full calibration (certified lab required)
Visual Reinforcement Audiometry (VRA) mode Conditioned Play Audiometry (CPA) mode Child-friendly interface with touchscreen
