Bone Conductor for audiometry

Ortofon is the manufacturer of the new high performance RADIOEAR B-81

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RADIOEAR B-81 technical data:

• High maximum output, low distortion
• Very robust product
• Dimensions: H 16 mm, L 31.7 mm, W 18.2 mm 
• Weight: 20 g
• Sensitivity:  118 dB re.1 µN @ 1 Vrms & 1 kHz
• Total Harmonic Distortion: 1% @ 1 Vrms & 1 kHz
• Impedance: 12.5 ohm @ 1 kHz
• Secured plug
NB: Measurements performed on Brüel & Kjær 4930, Artificial Mastoid with static force 5,4N.

For inquiries and supply of BC 81 please contact info@radioear.us.

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Please retrieve your copy of the SCIENTIFIC PAPER presented at the S2 workshop, 30 October, 2013, Chalmers, Gothenburg, Sweden: A New Audiometric Bone Conductor B81 for more accurate hearing diagnostics.

Co-authors: Karl Johan Fredén Jansson*, Bo Håkansson*, Leif Johannsen** & Tomas Tengstrand***.
* Department of Signals and Systems, Chalmers University of Technology, Göteborg, Sweden, **Ortofon A/S, Denmark, ***Hörselverksamheten & The Sahlgrenska Academy, Göteborg University, Göteborg, Sweden

The objective was to evaluate the electro-acoustic performance of the new audiometric bone vibrator Radioear B81 (Radioear Corporation, New Eagle, PA, USA). Comparison was made with the present Radioear B71 that has some well-known limitations at low frequencies.

For inquiries and supply of BC 81 please contact info@radioear.us.

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We are able to custom-made high-precision TPE and Technical Rubber components according to the customers’ specifications, which includes 3D drawing and material specifications.

Please see our Technical Rubber compounds database and the TPE compounds database.

Please read more about Ortofon Rubber production capacity and technologies applied and Ortofon Micro Injection Molding production.

Please send your inquiry to support@ortofon.dk. We treat all inquiries confidentially and aim to respond to queries within 24 hours of receipt.