The MS25 Hearing Aid Analyzer is a fully portable Two-in-one instrument which combines a sophisticated Hearing Aid Test Box with a comprehensive Real Ear Measurement System.

Using a combination of dedicated function buttons and software defined "F" keys, easy access to all the test options available on the MS25 is ensured. Together with its optional Keyboard, the MS25 indeed offers a highly specified yet very accessible working platform for both hearing aid testing and hearing aid fitting. The Keyboard allows all relevant patient and hearing aid data to be stored directly in the MS25 and later this can be printed together with relevant test results or, if preferred, all test results can be transferred to a PC via the built-in RS232C interface. Optional IBM compatible Windows software is available. MS25 is fully NOAH compatible.

The dual purpose loudspeaker of the MS25 can easily be rotated from the rear of the Test Box to provide the sound source for Real Ear measurements. In the In Situ mode, the MS25 can measure Open Ear Gain and Insertion Gain, In Situ SPL, Real Ear Input/Output Function and In Situ Distortion.
 

Direct Downloading of Audiograms

The MS25 Test Box employs a standard 2CC Reference Coupler for hearing aid measurements and includes adapters for in-the-ear, behind-the-ear and body worn hearing aids. The Test Box houses a built-in induction loop for measuring Pick-Up Coil Sensitivity. Battery adapters (optional) can also be connected to the Test Box for measuring hearing aid Battery Current.
The MS25 Test Box can be used for both routine testing, in compliance with relevant standards, or for carrying out hearing aid adjustment prior to fitting.
In the standard mode, measurements specified by both IEC and ANSI Hearing Aid Standards are available, including the above mentioned Battery Current and Pick-Up Coil Sensitivity tests. Additional options may also be selected in this mode.
The Test Box is also suitable for a number of specialized fitting measurements, which include Simulated Insertion Gain.
The Simulated Insertion Gain measurement Software utilizes special calculation routines which compute target fitting curves according to a number of common fitting rules, including NAL, POGO etc. These routines accommodate each of the three different coupler adapters available in the Test Box.
The MS25 can additionally use speech audiograms in its fitting protocol. The Test Box test options include a dedicated FM System balancing procedure, enabling accurate balancing of FM/Audio Input systems. For very noisy environments an optional highly insulated separate test box TBS25 is available.

Testing and Fitting

The MS25 Test Box can be used for both routine testing, in compliance with relevant standards, or for carrying out hearing aid adjustment prior to fitting. In the standard group of tests, measurements specified by both IEC and ANSI Hearing Aid Standards are available, including Battery Current and Pick-Up Coil Sensitivity tests. Additional options may also be selected from this group. The Test Box is also suitable for a number of specialized fitting measurements, which include Simulated Insertion Gain. The Simulated Insertion Gain measurement Software utilizes special calculation routines which compute target fitting curves according to a number of common fitting rules, including "NAL", "POGO" etc. These routines accommodate each of the three different coupler adapters available in the Test Box. The MS25 can additionally use speech audiograms in its fitting protocol. The Test Box test options include a dedicated FM System balancing procedure, enabling accurate balancing of FM/Audio Input systems.

Portability

The MS25 accommodates all its accessories within the unit itself, and for portable use an additional carrying case is available. The case will also house the optional Keyboard. The carrying case, moulded in resilient ABS and constructed with a rigid aluminum frame is extremely strong and robust providing maximum protection to the instrument.

Dedicated Keys

For maximum ease of operation, the most commonly used functions are accessed via dedicated command Keys. This means that Go/Stop ( Test), Intensity and Frequency Keys etc. can be selected without using an initial command.

Soft Keys

All routines are accessed via software defined function Keys or "Soft Keys". Although there are more than 30 different individual tests which may be performed on the MS25, all tests can be selected using only 6 Soft Keys.

Integral Printer

The MS25 printer is a four/color single chart feed unit which provides permanent copies of all test results.
 
The same print-out form is used for both Test Box and In Situ results. The chart used for the print-out covers 3 result groups: STANDARD, FITTING and IN SITU, with individual test curves identified by colors.

* The STANDARD group includes all the tests as specified by IEC and ANSI Hearing
   Aid Standards as well as Battery Current and Pick-Up Coil Sensitivity tests. A
   "Quick-Test" option allows the operator to personally program a defined test   
   procedure including only the desired test types.
* The FITTING group covers Simulated Insertion Gain Measurements.
* IN SITU group includes all Real Ear measurements.
   Along with the above mentioned test results, also input/output curves and   
   numerical values are printed, along with any manually entered comments.

Back-Lit Graphic Display

The large back-lit Liquid Crystal Graphic Display provides visual communication between the MS25 and its operator. The display will show the results obtained by the MS25 "on-line" as the test progresses, whether carried out in the Test Box or In Situ. The operator is provided with the added advantage of instant monitoring, particularly useful when adjusting hearing aid settings. The display also provides information on the different "soft-button" functions, and whether environmental noise levels are acceptable for testing. It also prompts the operator if an error has occurred.

Computer Connection

The MS25 is supplied with an RS232C computer interface as standard, allowing easy connection to a PC. The on-board software of the MS25 enables all test results to be transferred to an external database in a matter of seconds.

The MS40 Hearing Aid Analyzer is a compact Three-in-One instrument which combines a sophisticated Hearing Aid Test box with a comprehensive Real Ear Measurement System and full range Diagnostic Audiometer.

The audiometer will perform nearly all standard audiometric tests such as Air Conduction, Bone Conduction and Speech Audiometry. All results obtained on the MS40 can be printed out on the integral four color printer.

Audiometer

The built-in audiometer of the MS40 is a diagnostic audiometer incorporating air conduction, bone conduction with narrow band masking and
speech audiometry with speech noise masking.

Multiple speech curves may be recorded in Free Field (amplifier optional) for easy evaluation or documentation for improvements in aided speech discrimination. Speech signals are available from CD/Tape (optional) or live voice microphone EMS600 (optional).

All results obtained with the on-board audiometer can be printed out on the integral printer of the MS40 and will be presented in graphic form similar to the printouts shown. Even speech audiograms can be printed on the MS40 printer.

Loudness Scaling

The MS40 facilitates through its built-in audiometer the conduction of Loudness Scaling using Narrow Band Noise for stimulation. The Loudness Scaling curves are used by the MS40 to calculate target curves which can be used in the Test Box Mode for fitting e.g. nonlinear hearing aids.

In Situ Measurement

The dual purpose loudspeaker of the MS40 can easily be rotated from the rear of the test box to provide the sound source for Real Ear measurements. In the In Situ mode, the MS40 can measure Open Ear and Insertion Gain, In Situ SPL, Real Ear Input/Output Function and In Situ Distortion.

Integral Test Box

The MS40 Test Box employs a standard 2CC Reference Coupler for hearing aid measurements and includes adapters for in-the-ear, behind-the-ear and body worn hearing aids. The Test Box houses a built-in induction loop for measuring Pick-Up Coil Sensitivity. Battery adapters (optional) can also be connected to the Test Box for measuring hearing aid Battery Current.

The MS40 Test Box can be used for both routine testing, in compliance with relevant standards, or for carrying out hearing aid adjustment prior to fitting.
In the standard mode, measurements specified by both IEC and ANSI Hearing Aid Standards are available, including the above mentioned Battery Current and Pick-Up Coil Sensitivity tests. Additional options may also be selected in this mode.
The Test Box is also suitable for a number of specialized fitting measurements, which include Simulated Insertion Gain.

The Simulated Insertion Gain measurement Software utilizes special calculation routines which compute target fitting curves according to a number of common fitting rules, including NAL, POGO etc. These routines accommodate each of the three different coupler adapters available in the Test Box.

The MS40 can additionally use speech audiograms in its fitting protocol. The Test Box test options include a dedicated FM System balancing procedure, enabling accurate balancing of FM/Audio Input systems.
For very noisy environments an optional highly insulated separate test box TBS25 is available.

Integral Printer

The MS40 Printer is a four-color single chart feed unit which provides permanent copies of all test results, similar to the example shown on the flap. The print-out is simply obtained by inserting the pre-printed chart into the printer. All results, together with any information typed in via the optional keyboard, can be printed out in single or multiple copies.

Computer Connection

The MS40 is supplied with an RS232C computer interface as standard, allowing easy connection to a suitable PC.

Back-Lit Graphic display

The large back-lit liquid Crystal Graphic Display provides visual communication between the MS40 and its operator. The display will show all the results obtained by the MS40 "on-line" as the test progresses, whether carried out in the test Box, In Situ or with the audiometer. Additionally, the operator has the advantage of instant monitoring, particularly useful when adjusting hearing aid settings.

The display also provides information on the different "soft-button" functions, and whether environmental noise levels are acceptable for tests carried out in the Test Box. It also prompts the operator if an error has occurred.

Analyzer Print-Out

The Chart used for the print-out covers 3 test modes: STANDARD, FITTING and IN SITU.

At the top of the chart the test mode, to which particular results belong is printed. Individual test curves are drawn in one of four colors and identified at the top of the chart by its color and the symbol used on the curve (e.g. a red cross).

The STANDARD mode includes all the tests as specified by IEC and ANSI Hearing Aid Standards as well as Battery Current and Pick-up Coil Sensitivity tests.

The FITTING mode covers Simulated Insertion Gain measurements and the In Situ mode includes all Real Ear measurements.

The second section of the chart shows Input/Output functions obtained from both In Situ and Test Box measurements. Above this the stimulus used for the measurement will be shown.

The last section of the chart shows test results in numerical form together with any data previously entered via the optional keyboard.