With Madsen’s Capella, you can combine otoacoustic emissions (OAE) testing, screening tympanometry and infant hearing screening in the same Windows ™ -based system. Because Capella is software-based and modular, you can choose only those testing options you require now and add more later. Each testing mode is offered as a separate application module in the form of software and accessories. The following application modules can be freely combined : Distortion Product OAE, Transient Evoked OAE, Screening Tympanometry, and Echo-Screen ™ TEOAE Screening. Both OAE modules include a mode for measurement of Spontaneous OAE’s. Echo-Screen is Madsen‘s handheld OAE screener. Capella can now emulate Madsen’s Echo-Screen handheld OAE infant hearing screener. The new Screening Tympanometry module offers the choice of both 226 and 1000 Hz probe tones.

Pentium recommended, minimum 16 MB RAM. VGA Graphics Adapter. Windows operating system (NT, 95, 98, ME). RS232C Serial interface (min. 1 free COM port)

DISTORTION-PRODUCT OTOACOUSTIC EMISSIONS (DPOAE)


• Stimulus Level Range 30-70 dB SPL
• Stimulus 3rd order Intermodulation < -80 dB
• Input Sensitivity . 50 dB SPL: 80 to -30 dB SPL
• For Stimulus < 50 dB SPL: 60 to -50 dB SPL
• Microphone Frequency Response Accuracy : ± 3 dB from 500 to 4000 Hz ± 6 dB from 4000 to 9000 Hz
• Sound Level: 711 Coupler Reference (volume- compensat ed) ± 4 dB from 500 to 4000 Hz ± 7 dB from 4000 to 9000 Hz
• In Situ Sound Level Adjustment ± 4.5 dB from 500 to 4000 Hz
  
  

  TRANSIENTLY EVOKED OTOACOUSTIC EMISSIONS (TEOAE)
  
  

• Stimulus Type: (a) Non-linear Pulse width 40, 80, 120 µsec; (b) Linear: Unipolar click. Pulse width 40, 80, 120 µsec.
• Stimulus 30-80 dB p.e. SPL approx. -30 to 60
• Level Range dB nHL
• Level Accuracy ± 4 dB
• Acoustical Bandwidth 500-4000 Hz ± 5 dB @ 1000 Hz
  
  

  SPONTANEOUS OTOACOUSTIC EMISSIONS (SOAE)
  
  

• Input Sensitivity 0-70 dB SPL
• Frequency Ranges 500-5000, 500-10,000 Hz
  
  

  ECHO-SCREEN MODE
  
  

• Stimulus Mode Non-linear: Pulse width 83 µsec
• Stimulus 70-85 dB SPL automatic volume
• Level Range adapting
• Signal Bandwidth 1400-4000 Hz
  
  

  TYMPANOMETRY MODE
  
  

• Standards EN 61027, ANSI S3.39
• Probe Tones 226 Hz at 85 dB SPL 1000 Hz at 75 dB SPL
• Volume Range 0.1 ml to 8 ml
• Air Pressure Range +200 to -400 daPa Accuracy ±10% or ±10 daPa
  
  

DISTORTION-PRODUCT OTOACOUSTIC EMISSIONS (DPOAE)

• Stimulus: 2 stimulus channels
  
• Geometric Center Frequencies 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0 kHz
  
  

TRANSIENTLY EVOKED OTOACOUSTIC EMISSIONS (TEOAE)

• Stimulus Type: (a) Non-linear & 3 clicks of the same polarity and 1 click fast-Screen: of opposite polarity, at 3 times the amplitude of the 1st click; (b) Linear: Unipolar click. Pulse width 40, 80, 120 µsec.
  
  

ECHO-SCREEN MODE

• Stimulus Mode Non-linear,& 3 clicks of the same polarity and 1 click fast-Screen: of opposite polarity, at 3 times the amplitude of the 1st click.
  
  

Available tests

• TEOAEs
  
  
• DPOAEs
  
  
• SOAEs
  
  
• Tympanometry
  
  

The owners of the MADSEN PC-based systems can upgrade their products with software rather than having to buy new hardware. The MADSEN products integrate with office management networks (they support the NOAH TM standard) and hospital mainframe systems. Even equipment diagnostics and troubleshooting can be handled via modem.

Capella runs under the NOAH/PAX databases. All the OAE measurements can be organized in a professional database, allowing to manage more easily large numbers of patients. The OAE test system can be installed on the same PC or network you use to perform other audiological measurements, like audiometry and real ear measurement, for example. And all your measurements can be saved in the same patient file.

Attn: Mr. Paul Morrison, Product Manager.
GN Otometrics , 2 Dybendalsvænget , P.O. Box 119 , DK-2630 Taastrup , Denmark
Phone: +45 72 111 555
Fax: +45 72 111 548
E-mail address: madsen@gnotometrics.dk
web adress: www.madsen.com