Audiometro Manual

7/29/2019 Audiometro Manual

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Manual of tonal audiometry with a PC

MCT Ganseman BVBA

Steenweg 278

9470 Denderleeuw

Belgium

[email protected]

www.ganseman.com


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Contents

I Software installation p 4

Technical data

II Main Menu p 6

III Setup p 7 < - to do before the first record.

IV Record p 9

V PDF Print p 11

VI Integration - FAQ p 13

Integration p 13

Calibration p 14

Backup - New PC. p 15

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Introduction

The use of personal computers for generation of medical signals such as

signals for tonal audiometry has enormous advantages:

Inexpensive.

Ease of use.

Better cooperation from the patient.

High quality printing on A4 paper.

Recordings saved in database that can be consulted any time.

Sorting of patients by age, decibels etc. is possible with a single click.

Possibility to send recordings in protected PDF format by email

Possibility to compare two recordings on the computer screen.

Available frequencies: 125, 187, 250, 375, 500, 750, 1000, 1500, 2000, 3000,

4000, 6000 and 8000 Hertz. Accuracy is better than 1 percent.

Intensity calibration up to one decibel is possible

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I Software installation

The software is available as download on our site.

http://www.ganseman.com/Download.aspx

Download SetupAudio.zip. Unzip and execute SetupAudio.exe

Select 'English' as installation language and then always 'Next'.

The default installation directory is C:\Audio_A

When the installation is finished you will find in the installation directory

- Aud.exe : the program

*.adf Audiometer records

AudioEn.pdf: Manual

AudConfig.xml , the configuration file.

With 'Start' - PC - Audiometry Audio.exe the software is launched

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II Main Menu

1 2 3 4 5 6 7 8

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11 12 13 14

The icons are from left to right:

1 New record

2 View a selected record3 Print

4 PDF

5 Setup To do after a new installation.

6 Help

7 Quit

8 Convert: only visible when older *.aud audiometry files are located in the working

directory.

9 Search a patient by name or part of it.(1). Use arrows and enter to select and view a record

10 List of the records. Name, birth date and Id number of the patient.

The birth date is displayed with the year first : patients can be sorted by their age.

File: each record has an unique filename like Birth year_month_day_time.adf12 Mean total dB losses.

13 Mean dB losses at right side.

14 Mean dB losses at left side.

Important:

It is possible to sort all the items ascending in the listview by clicking above them on

name, first name, birth date etc.

Clicking once more sorts them descending.

Clicking right mouse button on the list of patients shows a short cut menu with the most

important options.

How to delete a record ? Select it and tape 'Del'.

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III Setup

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2

3

4 5 - 6

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9 10

Language (1) Choose English

Setup Maximale signaltime (2) Duration of the sound emission in milliseconds. 3 seconds

= 3000. This is long enough for most patients.

When the patient presses a button or the user emits another level, the original tone stops.

Setup-Equalizer (3 )

The human hearing is not equally sensible at all frequencies. Especially on low and high

frequencies the sensitivity is lower. You can also individually modify per frequency and per

side. Pay attention however, the software has been installed with the values that correspond to

as many headsets and PC's as possible. In case you wants to verify the calibration, you need to

use a decibel meter. How to do this practical is explained on page 16.

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Dir (4)

Directory were the program works, retrieves and stores recordings.

This can be another directory then the installation directory.

At right a drop down-arrow and two buttons are visible.

With the '+' (5) button the user can add up to 12 directories to a list.

With the '-' (6) button the user can delete a directory from the list. The directory itself

is not removed from the hard disk.

With the drop down-arrow switching between the different directories of the list

is easy.

It is possible to put a shared network directory here if required (example:

//Servername/Aud2011 )

Different users connected by a network can store and retrieve all their recordings

on a server.

Setup Users (7)

If there is only one user, leave the settings User2 in place. !

If there is more than one user, you have to select the user name on start of program.

Afterwards, you can always see who performed the examination.

Setup Interface (8).

When the program operates standalone, select None.

The intention of the other options is when the program is launched from another one.

See further 'Integration'

Setup Ok (9). Setup is saved in the file AudConfig.xml

Setup - Cancel (10) : Stops setup without saving !

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IV Record

Ask the patient to level the hand to the site he hears the sound. Ask to use both hands.

Make sure patient cannot see your mouse or the computer screen.

This could influence the examination. Put the headset on his ear (R) on his right ear, (L) on

his left ear. Click then on the leftmost icon.

1 2

3

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5 6

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8

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1 Previous : data of previous patient. If the patient had already a record,

look first at that record and use this button to take over the same data.

2 Clear all

3 Name of the patient

4 First name

5 Birth date in format mm dd yyyy

6 Checking switch birth date to mode mm dd yyyy

The year is mandatory with 4 digits. By doing so patients can be sorted by age.

7 Id number

8 M(ale) or (F)emale9 Ok: Go to recording

Verify that the sound of the PC is on maximum and the balance in the middle.

10 Cancel = return without doing anything.

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Recording screen:

Click with the left mouse button on the screen to generate the corresponding sound.

Start with an intensity and frequency that he will probably hear, e.g. 40 dB and 1000 Hertz.

If the patient shows with the corresponding hand that he hears the sound at the right side,press then the right mouse button on the same place.

When examination is finished, verify at right of the screen: name, first name,

date of birth and number. Enter your personal conclusion. Save (10) !

1 2 3 4 5 6 7 8 9 10

Icons above

1,3 and 5 colour of signal, grid and previous signal.

2 and 4 thickness of signal and grid

6 Eq start the equalizer. See section about calibration with a decibel meter.

7 Setup

8 Print on A4 paper

9 Generate PDF

10 Save and Quit.

Average loss: At right of the screen the average loss (right, left ) is indicated.

Click on the red downwards arrow to add it to your personal conclusion.

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VIEW a record. ( icon 2 of the main menu )

On the main screen, select a record and click on the view icon or 'enter button'

This screen is about the same as the recording screen.However recording is not possible on this screen.

It's possible to change your personal conclusion.

If you made an error in the personal data of the patient, it can still be changed.

This screen has only one extra option;

When you select 'Previous' the previously loaded signal is also displayed and

you can compare two recordings on screen.

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V PDF and Print

You can create a PDF file from your record. PDF files can be read by Acrobat Reader, which

can be downloaded for free at www.adobe.com.

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2

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1 Filename. Proposed is date_time_record.pdf

It's possible here to enter another name with the extension .pdf

2 Password. Leave empty if you don't want to protect with a password. However a

password is mandatory when you send a file with personal data by means of email.

3 and 5 Colour of signal and grid.

4 and 6 Thickness of signal and grid.7 Starts PDF generation.

8 Quit.

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Print

Select a record and click then print

This screen has the same options as PDF generation for selection of the colours and line

thickness. If different printers are connected to the PC, then select first the desired printer

for output. 'Start' initiates the A4 output.

Dont overlook the possibility to print from other programs like Microsoft Wordwith Alt Print screen and Ctrl-V.

Example :

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VI Integration - FAQ

Integration

Starting from a patient program it is possible to start the Audiometer software directly. The

advantage is that it is not necessary for the user to retype the name, first name, birth date and

ID of the patient. We offer three possibilities:

. Arguments

Start the Audiometer program with parameters name, first name, birth date and ID. Name and

first name can be in different parts and must be put between " "

Ask your software developer to contact us how to do this.

. XML

Some software has the possibility to make an XML file XML in the Audiometer workingdirectory. This file must have the name ident.xml.

.Data.txt

If your program has the possibility to generate a textfile in the installation directory with 5

lines in it

Name

First name

Birth date

Id NumberM or F

and the audiometer program is launched, this data are available.

Reverse integration

Data of the last loaded *.adf file are exported to an xml file with the name Protocol.xml,

located in the working directory.

A software developer can capture this file and incorporate the data into its own software.

Another possibility is to capture a pdf file for integration.

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Calibration

Place the meter between the headphone as above.

Go to the recording screen. Start e.g. with 1000 Hertz and 70 decibels.

Suppose that the decibel meter displays 66 decibels. With the equalizer add 4 decibels

on 1000 Hertz.

If one intensity of a given frequency is correct then the other intensities of that frequency are

also correct.

Most audiometers and also our software operate with steps of 5 decibels.

So calibration up to 3 decibels is often considered ok.

Why not calibrate on 0 decibels ?

Even a silent room has already a noise level of >30 decibels.

Most meters start to measure from 40 decibel.

Why not calibrate on 85 decibels ?

Some margin is necessary for calibration, in particular for the lowest and highest frequencies

Is it possible to examine bone conduction with this method ?

Yes, but only up to 50 dB. Most bone conductors need about 30 dB more intensity.

What to do if the signal right left is inverted ?

Invert also the headphone.

The sound sorts from both sides of the headphone:

Three possibilities:

The plug of the headphone is not inserted deep enough into the PC's socket.

Your headphone is not in stereo but in mono.

The sound of the PC is mono.

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Help, I thought to hear well and I hear nothing on 0 dB :

Don't worry to quick. Take a look to the examples.

Even with young people 15 or even 20 dB of losses may fall between the normal limits. Start

the examination with 45 dB and 1000 Hertz.

Definition of the 0 dB level :

The 0 dB value as a physical value is the difference in air pressure at a given frequency.

This value is also a statistical value:

Consider

- a sufficient amount of patients.

- aged 12 years and without an apparent ear sickness.

- ideal circumstances, a silent room.

On this population the mean level of perception is the 0 dB level.

Some patients will even hear on a lower level then 0 dB at -5, -10 or even -15 dB.Others only on +10 or even +15 dB. All belong to the normal distribution.

No sound, recording seems not possible or software not functioning.

Verify that the volume control is on maxmost and not on 'mute' !

Restart the PC.

Remove the headphone from the PC and verify the function of the speakers.

If the speaker function is normal, the headphone or his extension cable is probably

defective.

How to make a backup ?

To every other location: CD, USB stick, external hard disk, other PC of the network, etc. Use

Windows Explorer to copy many Audiometer files (C:\Audio_A\*.adf) at once.

New PC How can I move my recordings (*.adf files) to a new PC?

Two possibilities:

A/ Download the newest version on our site www.ganseman.com Unzip and execute

AudioSetup.exe. Copy the old *.adf files to the installation directory on the new PC.

B/ Copy the directory C:\Audio_A and content to the new PC.

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Audiometro Manual

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