Sophono™ Alpha 2 MPO™ Processor 

The SophonoTM Alpha 2 MPO™ magnetic bone conduction hearing system brings abutment-free bone conduction to your patients with the smallest magnetic implant on the market. The implant lies completely under skin and has low risk of skin issues.1,2 After healing, the skin and hair loAlpha 2 MPO magnetic bone conduction hearing device with the smallest implant processorok normal, with no titanium abutment protruding through the skin like other bone conduction systems. The implant consists of two magnets hermetically sealed in a titanium case. An Attract® magnetic spacer (connected to the external processor) is held in position by the magnetic implant. The processor transmits audio vibrations through the skin into the bone where sound is sensed by the cochlea.

No other implant system - abutment or magnetic, offers the simplicity, low profile and stability of the SophonoTM device.3

The Sophono™ Alpha 2 MPO™ Bone Conduction Hearing Device offers the Lowest Profile Processor

Take advantage of the performance available with up to 45 dB of feedback free gain!3
Compared to other transcutaneous devices that means up to 7 dB more of feedback free gain!  That's 60% louder than our competition!4

The SophonoTM Alpha 2 MPO™ bone conduction hearing device provides improved performance with the highest functional gain, accompanied by outstanding sound quality. Your patients now experience our processor with 45 dB acoustic-mechanical gain, an increase of 16 dB.4 The figure below shows how the SophonoTM device output, measured in force (micronewtons), correlates to the input in decibels sound pressure level (SPL) for varying tones.  For audiologists concerned with the acousto-mechanical gain, you can see that along the 60 dB SPL curve there’s an acousto-mechanical gain up to 45 dB at 1,600 KHz. Compared to other bone conduction hearing systems, this proves to be a powerful gain in hearing for your patients. SophonoTM offers more sound amplification (gain) than any other magnetic transcutaneous system!5

Abutment-Free Bone Conduction with up to 45 dB of Feedback Free Gain


Acousto-mechanical gain at 1.6 KHz and 60 dB SPL.
Alpha 2 MPO Output more than 105 dB µN4


Compared with other transcutaneous hearing systems:

  • More than 4,000 patients have the SophonoTM implant, a safe alternative to more intrusive implants.7
  • SophonoTM has the lowest profile processor, a sleek solution that may be hidden under the hair.
The Alpha 2 MPO magnetic bone conduction hearing system features a titanium encased magnetic  implant, an external processor, and 12 Attract® magnetic spacers with variable strengths to ensure patient comfort and secure fit.

Proprietary TET™ Technology

Transcutaneous Energy Transfer (TET) technology enables maximum transfer from the SophonoTM sound processor, through the patient’s skin and magnetic bone implant, to the working cochlea. TET eliminates up to 20 dB of energy reflection on skin typically associated with percutaneous systems.8

MRI Compatible up to 3 Tesla

The SophonoTM is FDA cleared for MRI conditional up to 3 Tesla.9,10 In non-clinical testing, when positioned parallel to the patient table, the Alpha (M) Magnetic Implant maintained over 95% of its original magnetic strength after 10 insertions into the static magnetic field of a 3-Tesla MR system and a 10-minute imaging sequence in a 3 Tesla Siemens Tri Clinical MRI Scanner (MRC20587). The SophonoTM produces a 5 cm shadow,9 the smallest transcutaneous MRI shadow, and does not require implant removal. You can safely use an MRI only under the following conditions:
  • ƒRemove all external components including the OtomagTM Alpha Sound Processor, Magnetic Spacer, Headband or Softband before entering the MRI environment.
  • Static magnetic field of 3 Tesla or less
  • Spatial gradient field of 720 Gauss/cm or less
  • Maximum whole-body averaged specific absorption rate (SAR) of 4 W/kg in the First Level Controlled Mode for a maximum scan time of 15 minutes of continuous scanning (per pulse sequence).

Product Specification for the SOPHONO™
Alpha 2 MPO™ Processor: 

Feature Details Alpha 2 MPO processor
Placement Either side, with ergonomic grip design
Headband Configuration Yes
Softband Configuration Yes
Abutment-Free Yes
Digital Signal Processor Yes
Data Logging Yes
Programs/Memories 4
Microphone Two microphones in an isolated compartment with omni and directional modalities
Direct Audio Input Standard Europlug
Retention Clip and Lanyard Standard
Auto Noise Reduction Yes
Auto Feedback Suppression Yes
Frequency Range 125 - 8000 Hz
Processor 16-band, 8-channel WDRC
Power Supply Type 13 zinc air battery

Peak Output Force Level11
at 90 dB SPL re 1µN

115 dB

Output Force Level11
at 60 dB SPL re 1µN

105 dB
Battery Life12 up to 320 hours
Audible Warning Tones Yes
Colors Anthracite, Brown, Champagne, Silver
Skinit® Decal Gift card for one pair included.
>> See Practice Support for more information. <<
Ready to have your patients sample a SophonoTM?    Request Now

1Siegert R. Semi-implantable transcutaneous bone conduction hearing device with fitting on the day of surgery. Presented at the 29th Politzer Society Meeting Antalya, Turkey, Nov 2013. 2Centric A and Chennupati, SK, Abutment-free bone-anchored hearing devices in children: Initial results and experience - International Journal of Pediatric Otolaryngology 2014. 3,4Based on data from internal testing with acousto-mechanical gain at 1.6 KHz and 60 dB SPL. 5Comparing published transcutaneous device specifications of acousto-mechanical gain at 1.6 KHz and 60 dB SPL. 6Based on physical characteristics of the implant. 7Siegert R and Kanderske J. A New Semi-Implantable Transcutaneous Bone Conduction Device: Clinical, Surgical, and Audiologic Outcomes in Patients with Congenital Ear Canal Atresia. Otology & Neurotology 2013, 34:927-934. 8Zarowski, Verstraeten, Somers, Riff and Officers in Kompis and Caversaccio (Editors) Implantable Bone Conduction Hearing Aids, Karger, 2011 9Internal Test Report, Evaluations of Magnetic Field Interactions, Hearing and Artifacts for the Alpha 1 (M) Magnetic Implant, Frank G. Shellock, Ph.D, FACR, FISMRM, August 10, 2012. 10Azadarmaki R, Tubbs R, Chen DA, Shellock FG. MRI information of commonly used otologic implants: Review and update. Otolaryngology–Head and Neck Surgery 2014, Vol. 150(4) 512–519. 11  Comparing published transcutaneous device specifications of acoustic-mechanical gain at 1.6 kHz and 60 dB SPL. 12SophonoTM Internal Validation Testing of Battery Life.
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