• r27a two-channel diagnostic audiometer
• HD300 headphones
• B71 bone vibrator
• Power supply
• USB drive containing
  • certificates and technical documents
  • installer file for MDS Resonance Database Management Software
  • user manual
  • tutorial and procedures
• Medical power supply with 4 plug adapters (including standard AC plug adapter for U.S.)
• Operator headset with microphone
• Patient talk-back microphone
• Patient response switch
• Dust cover

Is there a guide outlining front panel controls and/or how things plug into the back of the unit?

Click Controls & Components tab in the product description; the information is also outlined on pages 34-35 of the user manual (see Product Docs tab, and click User Manual icon).

How do I turn the device on?

How do I use the built-in printer?

I am getting a License Key activation prompt.  What is this and how do I find the License Key for my unit?

How to I store values on the audiogram?

How do I talk to the patient (talk forward)?

The operator can communicate with the patient either via a built-in microphone (3) or operator headset with microphone (included; connects to back panel). Once the operator headset with microphone is connected via the rear panel, the built-in microphone will be deactivated.  To talk to the patient, press the T. Over button (15) and keep it pressed while speaking. The patient will be able to hear the operator via the transducers used for test performance (headphones, bone conductor, speakers). Volume levels of the operator talk forward microphone and the operator headset can be adjusted by selecting the CONTROLS (14) key and using arrow keys or Ch1 and Ch2 dials. See Controls & Components for visual orientation to buttons and controls of this unit.

How does talk back work (e.g. hearing what the patient is saying)?

The patient speaks to the operator over the patient microphone that is connected to the unit via the rear panel (25). The operator can hear the patients via the built-in monitor speaker of the audiometer or via the operator headset, which is connected to the appropriate connector located on the unit’s rear panel (27). Once the operator headset is connected via the rear panel, the built-in speaker is excluded. The patient microphone can be adjusted by selecting the CONTROLS (14) key and using arrow keys or CH 1 and CH2 dials. See Controls & Components for visual orientation to buttons and controls of this unit.

CONTROLS AND COMPONENTS (FRONT SECTION)

1. Display

2. Built-in thermal printer compartment (obsolete; this audiometer requires external printer)

3. microphone (talk forward)

4. Channel 1 & 2 dials

5. F1 - F6 function keys 

6. Test key: when in testing mode, this key returns to main menu

7. Enter key: when in test mode, key for accessing tests from main menu

8. Right vs left ear inputs

9. Output/input for each channel

10.  Arrow keys: to navigate menus

11. Norm/Rev: for signal transmission.  Norm mode (output signal present when pressing SIGNAL button); rev mode (output signal constant and stopped when pressing SIGNAL button)

12. Signal: when audiometer in Norm mode, press button to present signal; in rev mode, press button to stop signal

13. Frequency

14. Controls: provides access to external signal adjustment and calibration page, for monitor-headset, for patient-to-operator mic (talk back), and for operator-to-patient mic (talk forward)

15. T over: talk forward microphone volume

16. Star/Stop: enables start/stop of special features/tests (auto threshold, SISI, Tone Decay, Bekesy)

17. Store: storage/display of threshold values

18. Print: prints test results to printer or to generate PDF report

CONTROLS AND COMPONENTS (BACK SECTION)

19. right (red) and left (blue) standard headphones (DD45)

20. high frequency headphones (DD450)

21. sound masking 

22. B71 bone vibrator

23. free field

24. external cd player

25. talk back microphone

26. talk forward operator microphone

27. operator monitor headset

28. patient response button

29. second patient response button (note: obsolete)

30. SD card (speech test materials packaged with device)

31. port for optional USB keyboard and external USB data

32. PC communication and data transfer

33. ON-OFF switch with main fuse holders and main power supply connection

34. optional operator microphone port

Things to Know Before you Buy

The built-in printer feature is obsolete and no longer functional

At the end of 2021, the printer was discontinued and Resonance was unable to find a comparable replacement that would fit in the unit.  Rather than redesigning the r27a form factor, the built-in printer comportment remains on current units. 

The unit does come packaged with free MDS software that allows data transfer from the audiometer to your PC for data management and report generation. The transferred data can be printed off from your PC. This represents the most common way providers print data from this unit. Another option for printing data from the unit is to purchase a compatible external printer that connects directly to the unit.  

Technical support, calibration, and service is provided and managed through Oaktree Products

Responsive, efficient, and effective support is critical for busy providers to be able to use their equipment without delay. Equipment calibration is required annually. Equipment may need to be serviced over the years.  Oaktree Products has made arrangements to coordinate and provide support, calibration and service to allow providers to focus on their clinical practice.

NOTE:

• see PRODUCT DOCUMENTS tab and click SOFTWARE MANUAL to download MDS User Manual
• QUICK START and QUICK START NOAH instructions outlined below after INSTALLATION

Minimal Requirements for PC to work with MDS Software:

• Windows XP
• Windows Vista
• Windows 7
• Windows 8

Minimal Requirements for Noah to work with MDS Software:

• Noah version 4.X.

Resonance MDS Software & License Key:

The Resonance MDS Software is included free of charge with this Resonance unit. The software allows creation and management of a patient database on your PC and the ability to transfer patient information and test results from your Resonance unit to your PC. As a software program, a license key will be required to permanently activate the MDS software. The license key can be found within the Resonance License PDF file that resides in the MDS Suite folder on the USB thumb drive packaged with your unit. Print or refer to this file when your unit generates a prompt for MDS License Key Activation. 

MDS License Key Activation: 

The MDS software file resides in the MDS folder on the USB thumb drive packaged with your unit. The software is located on the USB thumb drive packaged with the unit.  Go to the MDS Suite folder, click MDS Setup and follow installation instructions. Be sure to click "Create Shortcut to Desktop" when prompted to have the software icon appear on your desktop for easiest access. NOTE: MDS software will accommodate data from five patients without requiring a software license activation key. When trying to add data from the sixth patient, the following Licensure Key activation window will appear:

This means the demo version of the MDS software has expired and it will be necessary to enter the License Key associated with your specific unit.  The MDS License Key is listed in the PDF file called Resonance License located within the MDS folder on the USB thumb drive that came packaged with the unit.  If you are unable to find the PDF file, contact Oaktree Products with the make/model and serial number of your unit.  We will make arrangements for the vendor to issue the necessary MDS License Key. 

Cables for Connection with PC:

The Resonance device can be connected to a PC using a USB cable (included)

INSTALLATION: 

• Insert USB drive to PC
• Double click file "MRS Resonance Setup.exe" to begin install
  • select YES if prompted with "Do you want to allow the following program from an unknown publisher make changes to your computer?"
• Select language for installation from provided choices
• At the Welcome screen, to continue, select NEXT
• When prompted "Would you like to install this device software?", check the box next to "Always trust software from MRS Srl", then click INSTALL
• When installation complete, select either "Run MRS Resonance Now" to run the program immediately, or click FINISH to complete installation and exit the program
• The icon of the program will now be present on the PC desktop and in the program bar called MRS Resonance

Quick Start Instructions:

• launch program
• at the authentication window, "admin" will populate as UserName
  • type "a" (lower case letter a) as the password (password can be changed later)
  • check the box "remember me" to no longer have the authentication window populate when launching program
• click SESSIONS (upper horizontal menu bar)

To Create a New Patient:

• click NEW (from upper horizontal menu bar)
• fill the the following MANDATORY FIELDS
  • First Name
  • Surname
  • Birth Date
  • Birth Place
  • Choose Gender
  • click PRIVACY ACCEPTED
• click SAVE to create patient
• click EDIT (to proceed with transferring data from Resonance device to your PC)

Transferring data from Resonance unit to PC:

• after creating NEW patient, the icon "Acquire data from device" will be active
• conduct test on the Resonance unit
• connect Resonance device to the PC where MDS is running
• click on "Acquire data from device"
• an "Acquisition" or "Acquisizione" window will appear
  • select the Resonance device from pull down menu appearing under destination patient name
  • click DOWNLOAD
  • once the system indicates "Acquired Data", click SAVE & EXIT button to store data in database

View transferred test data:

Once data is transferred from a Resonance unit to a PC and saved, the test data will not reside in the '"Patient Historic Sessions" area located in lower left hand portion of the screen. To view the transferred data:

• select SESSIONS tab located in the lower right hand portion of the screen under the image of the patient silhouette
• in the TESTS IN SELECTION SESSION, click VIEW TEST DETAIL  

QUICK START NOAH:

• launch MDS
• click icon in the left upper corner of main window
• select TOOLS > Noah > Register Module (this procedure executed one time only)
• close Resonance software suite and run Noah
• once Noah opened, a RESONANCE button will appear in the upper horizontal menu
• to transfer data, follow instructions outlined above QUICK START INSTRUCTIONS, and select a patient in the Noah database
• click RESONANCE button to run MDS
• MDS will initiate; when the "Acquisition" or "Acquisizione" window appears, click DOWNLOAD to transfer data to Noah database