High performance RADIOEAR B-81 Bone Conductor

For audiometry and more accurate hearing diagnostics

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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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Scientific Paper

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.

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.

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


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