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Auditdata Measure · NEW TRANSDUCER LINE · CA1
Class 2a Medical Device · IEC 60645-1 · ANSI S3.6 · ISO 389-5 / 389-8
The Auditdata CA1 is a circum-aural audiometric headphone designed for clinical hearing loss diagnostic testing, covering 125 to 8,000 Hz in the standard variant and 125 to 16,000 Hz in the CA1 HF variant. With a sensitivity of 100 dB SPL at 1 kHz and passive ambient attenuation of up to 44 dB at 4 kHz, the CA1 is validated by Dr. Marion Bug at PTB Berlin and independently tested by Audiometrix.
The CA1 has been independently validated by Dr. Marion Bug at PTB Berlin and evaluated by Austrian audiology experts Audiometrix under simulated real-clinic conditions — confirming reliable, accurate measurements suitable for professional audiometry.
The CA1 HF variant extends testing to 16,000 Hz for extended high-frequency audiometry, using the same certified platform. One headphone family covers routine pure-tone testing and extended HF protocols, minimizing equipment investment.
Passive noise attenuation of up to 44 dB at 4 kHz reducing the need for fully sound-treated booths in many clinical environments. Color-coded earcups and single-sided cable connection further streamline setup and reduce placement errors.
Best Care Experience
Great hearing care starts with great measurement. The CA1 was designed around the realities of a working audiology clinic where reliable results matter as much as efficient workflows and patient comfort.
Whether running a standard pure-tone test or an extended high-frequency protocol, the CA1 delivers consistent, certified performance from the first patient of the day to the last.
Consistent results, every session. Stable calibrated performance means audiologists focus on the patient, not the equipment.
Designed for real clinic environments. Excellent passive attenuation supports accurate testing even in non-soundproofed rooms..
Serviceable for long-term value. Cushions, headband, and cable are all available as spare parts for repair and refurbishment, reducing total cost of ownership.
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WHAT WE CLAIM
The CA1 is built to perform to specification, here's exactly what that means.
High-quality audio performance specifically designed for hearing loss testing across the full audiometric frequency range.
Output Sound Level Precision of ±3 dB controlled accuracy across the full −10 to 120 dB HL range, at time of manufacturing.
Total Harmonic Distortion below 2.5% at recommended max output levels, maintaining signal purity across the full test range.
Sensitivity of 100 dB SPL at 1 kHz, 1 mW verified at time of manufacturing for reliable, repeatable output levels.
Color-coded earcups for instant left/right identification reducing placement errors and speeding up clinical workflows.
Passive ambient attenuation up to 44 dB at 4 kHz supporting accurate testing in non-soundproofed clinical environments.
Biocompatible per ISO 10993-1 lead, nickel, and latex free; RoHS compatible. Safe for direct patient contact.
Available on request in multiple plug formats DIN, Mini-DIN, Mono Jack, Stereo Jack, Stereo Mini-Jack — for broad audiometer compatibility.
Technical Datasheet
Related Standards: IEC-60645-1:2017, ANSI S3.6:2018 (R2023), ISO 389-5:2006, ISO 389-8:2004
Frequency Range CA1: 125 Hz – 8,000 Hz
Frequency Range CA1 HF: 125 Hz – 16,000 Hz
Output Level Range: −10 – 120 dB HL
Output Level Precision*: ±3 dB
Sensitivity*: 100 dB SPL @ 1kHz, 1mW
Distortion*: <2.5% at Recommended Max Levels
Nominal Impedance: 40 Ω (±15%)
*At time of manufacturing · Copyright © Auditdata A/S. 2026/03
Whether you need standard or HF variants, a single site or a full network rollout — our team will help you configure the right solution for you.
The CA1 is a circum-aural (over-ear) audiometric headphone manufactured by Auditdata for clinical hearing loss diagnostic testing. It covers 125–8,000 Hz in the standard version and 125–16,000 Hz in the HF variant. It is PTB Berlin validated and certified as a Class 2a Medical Device per IEC 60645-1:2017 and ANSI S3.6:2018.
The CA1 is a circum-aural (over-ear) headphone purpose-built for pure-tone audiometry and hearing loss diagnostic testing in clinical settings. Its over-ear design provides passive ambient attenuation of up to 44 dB at 4 kHz, reducing the impact of background noise in real-world clinic environments without requiring a fully soundproofed booth.
The CA1 covers the standard audiometric frequency range of 125–8,000 Hz and uses a Red Mini-DIN connector (Part No. 100.064). The CA1 HF extends testing to 16,000 Hz for extended high-frequency (EHF) audiometry and uses a Yellow Mini-DIN connector (Part No. 100.065) for visual identification. Both variants share the same PTB Berlin validation (DN02777).
The CA1 provides passive ambient noise attenuation of up to 44 dB at 4 kHz, 43 dB at 6,000 and 8,000 Hz, and 17 dB at 125 and 250 Hz, reducing the impact of background noise during audiometric testing without a soundproofed booth.
The CA1 is available on request in DIN, Mini-DIN, Mono Jack, Stereo Jack, and Stereo Mini-Jack plug formats, covering broad audiometer compatibility. It is natively supported on the Auditdata Measure.
The CA1 was validated by Dr. Marion Bug at PTB Berlin (ETSPLs reference DN02777) and independently evaluated by Audiometrix. PTB Berlin confirmed the headphones are suitable for audiometric applications and provide reliable, accurate measurements for professional audiometry.