/// <summary>
/// pureToneTest is used to control playing patients' responses to pure tone testing
/// </summary>
/// <param name="testCh">which "side" of the audiometer is used for testing</param>
/// <returns>the patient response</returns>
private int pureToneTest(Audiometer.channelSettings TestChannel, Audiometer.channelSettings MaskedChannel)
{
int patResp = -1;
patResp = pt.DetermineResponsePureTone(TestChannel, MaskedChannel, admtr.ameterSettings);
// Need the "wrong stimuli" message box code from below
/*
testEar = (testCh == (int)Ear.left) ? admtr.Channel1.route : admtr.Channel2.route;
int ntEar = (testEar + 1)%2;
int testType;
dB = new int[2];
//string resString = "";
if (testCh == (int)Ear.left)
{
// determine whether test is AC or BC
testType = (admtr.Channel1.trans == Audiometer.TransducerType.Bone) ?
(int)TestType.BC : (int)TestType.AC;
// determine what the IA values are for the testEar
dB[testEar] = admtr.ameterSettings.ch1_tone;
// checks that the ch2 interrupt is selected and the stimulus is NB for masking
// If interrupt is not selected then set db[ntEar] to a value low enough not to effect the
// threshold value in the patient response function
if (admtr.ameterSettings.ch2_interrupt_select == false)
{
dB[ntEar] = -50; // that's pretty low
}
dB[ntEar] = (admtr.ameterSettings.ch2_interrupt_select &&
admtr.Channel2.stim == Audiometer.StimulusType.NB) ?
admtr.ameterSettings.ch2_tone : 0;
if (admtr.ameterSettings.ch2_interrupt_select &&
admtr.Channel2.stim != Audiometer.StimulusType.NB)
{
// this means that masking isn't set up right -- alert in practice mode
MessageBox.Show("Masking is not set up correctly (wrong stimuli)");
return (int)ResponseType.NoResponse;
}
// determine pure tone response
patResp = pt.DetermineResponsePureTone(testEar, admtr.ameterSettings.frequency,
testType, IA, dB, ref resString);
}
else if (testCh == (int)Ear.right)
{
// determine whether test is AC or BC
testType = (admtr.Channel2.trans == Audiometer.TransducerType.Bone) ?
(int)TestType.BC : (int)TestType.AC;
// determine what the IA values are for the testEar
dB[testEar] = admtr.ameterSettings.ch2_tone;
// checks that the ch1 interrupt is selected and the stimulus is NB for masking
dB[ntEar] = (admtr.ameterSettings.ch1_interrupt_select &&
admtr.Channel1.stim == Audiometer.StimulusType.NB) ?
admtr.ameterSettings.ch1_tone : 0;
if (admtr.ameterSettings.ch1_interrupt_select &&
admtr.Channel1.stim != Audiometer.StimulusType.NB)
{
// this means that masking isn't set up right -- alert in practice mode
MessageBox.Show("Masking is not set up correctly (wrong stimuli)");
return (int)ResponseType.NoResponse;
}
// Determine patient's response
patResp = pt.DetermineResponsePureTone(testEar, admtr.ameterSettings.frequency,
testType, IA, dB, ref resString);
}
else
{
Console.WriteLine("Invalid test parameters");
return (int)ResponseType.NoResponse;
}
testEar_IA = IA[testEar];
*/
return patResp;
}
/// <summary>
/// This function returns an enumerated type to describe the patients response to
/// to a pure tone test
/// ex.
/// DetermineResponsePureTone(Ear.Left,Freq.f_250,TestType.AC, new int[2]{40,40},
/// new int[2]{50,20}, ref result);
/// </summary>
/// <param name="testEar">pass in the ENUMERATED test ear</param>
/// <param name="freq">pass in the ENUMERATED frequency</param>
/// <param name="testType">pass in the ENUMERATED AC or BC type </param>
/// <param name="IA">pass in an array of IA's [left ear, right ear]</param>
/// <param name="dBLevels">pass in an array of dB Level's [left ear, right ear]</param>
/// <param name="result">a reference to a string to store result at current test</param>
/// <returns>an enumerated type describing the response (includes ear, and relative surety)</returns>
public int DetermineResponsePureTone(Audiometer.channelSettings TestChannel,
Audiometer.channelSettings MaskedChannel, Audiometer.audiometerSettings ameterSettings)
{
int freq = ameterSettings.frequency; // simplify ameterSettings.frequency
Ear testEar = TestChannel.route;
Ear ntEar = testEar == Ear.left ? Ear.right : Ear.left;
int NonTestEarThresh;
int UnmaskedThreshold, MaskedThreshold;
int OE;
int[] IA = new int[2];
Random rand = new Random(); // Randomize patient response when not masking
int thresh;
if (TestChannel.trans == Audiometer.TransducerType.Bone)
{
MaskedThreshold = path.BC_Mask_Val(freq, testEar);
UnmaskedThreshold = path.BC_Thresh_Val(freq, testEar);
NonTestEarThresh = path.BC_Thresh_Val(freq, ntEar);
// Determine OE
switch (ameterSettings.frequency)
{
case 250:
OE = 20;
break;
case 500:
OE = 15;
break;
case 1000:
OE = 10;
break;
default:
OE = 0;
break;
}
}
else
{
MaskedThreshold = path.AC_Mask_Val(freq, testEar);
UnmaskedThreshold = path.AC_Thresh_Val(freq, testEar);
NonTestEarThresh = path.AC_Thresh_Val(freq, ntEar);
OE = 0;
}
#region Interaural Attenuation
switch (TestChannel.trans)
{
case Audiometer.TransducerType.Phone:
IA[(int)testEar] = 40;
break;
case Audiometer.TransducerType.Insert:
IA[(int)testEar] = 60;
break;
default:
IA[(int)testEar] = 0;
break;
}
// determine what the IA values are for the non-test Ear
switch (MaskedChannel.trans)
{
case Audiometer.TransducerType.Phone:
IA[(int)ntEar] = 40;
break;
case Audiometer.TransducerType.Insert:
IA[(int)ntEar] = 60;
break;
default:
IA[(int)ntEar] = 0;
break;
}
#endregion
int minPlateauPoint;
int maxPlateauPoint = 0;
// Determine the minimum and maximum masking levels (Min and Max equations)
// Maximum: BCnte + IA - 5 for bone and air
// Minimum: BCnte + 15 + OE for bone
// ACnte + 15 for air (NOTE: OE set to 0 if using air)
int maxMaskingLevel = IA[(int)ntEar] + path.BC_Thresh_Val(freq, ntEar) - 5;
int minMaskingLevel = NonTestEarThresh + 15 + OE;
// Determine the center of the minimum and maximum masking levels
// The plateau should occur here
float averageMasking = (float)((maxMaskingLevel + minMaskingLevel) / 2.0);
// Use truncation to determine if the patient will respond 3 times or 4 times
// at the plateau
int truncatedAverage = (int)averageMasking;
if ((float)truncatedAverage != averageMasking)
{
// If the average is not an integer, then use 4 points for the plateau
// by rounding down to the lowest 5 db point and offsetting the maximum
// plateau point by 5 db
truncatedAverage -= 2;
maxPlateauPoint = 5;
}
// Determine where the beginning and end of the plateau is
minPlateauPoint = truncatedAverage - 5;
maxPlateauPoint += truncatedAverage + 5;
// If the minimum masking level is greater than, equal to, or within 15 dB of the
// maximimum masking level, then this is a masking dilemma
// 15 dB range is due to the fact that a plateau must be at least 3 points wide
// to determine true hearing level
if (MaskedChannel.interrupt && maxMaskingLevel - minMaskingLevel < 15)
// Since a masking dilemma has been encountered, the patient should not plateau
maxPlateauPoint = minPlateauPoint;
if (MaskedChannel.interrupt)
{
// Masking
// Assume the patient will respond at the masked level
thresh = MaskedThreshold;
// Determine if the masked noise is to loud or soft for the masked level
if (MaskedChannel.volume > maxPlateauPoint)
{
// If the masked noise is too loud, then the patient response will be the masked level
// plus the difference between the maximum plateau point and the masked test level
thresh = MaskedThreshold + MaskedChannel.volume - maxPlateauPoint;
}
// check for under masking
else if (MaskedChannel.volume < minPlateauPoint)
{
// If the masked noise is too soft, then the patient response will be the masked level
// plus the difference between the minimum plateau point and the masked test level
thresh = MaskedThreshold + MaskedChannel.volume - minPlateauPoint;
// If the new threshold is less than the actual bone level, then just assign the threshold to the bone level
if (thresh < UnmaskedThreshold)
thresh = UnmaskedThreshold;
}
}
else
{
// Not masking, patient responds at the unmasked level
thresh = UnmaskedThreshold;
}
// determine response
if (TestChannel.volume == thresh)
{
// if masking is not a factor - respond occasionally
if (MaskedChannel.interrupt == true || rand.Next(10) <= 7)
return (testEar == (int)Ear.left) ? (int)ResponseType.LeftUnsure : (int)ResponseType.RightUnsure;
}
else if (TestChannel.volume >= thresh + 5)
{
return (testEar == (int)Ear.left) ? (int)ResponseType.LeftSure : (int)ResponseType.RightSure;
}
return (int)ResponseType.NoResponse;
}
/// <summary>
/// Called when the whole program first loads
/// </summary>
private void VirtualLabToplevel_Load(object sender, System.EventArgs e)
{
// Display a "WELCOME SCREEN" allowing the user to chose the program type
WelcomeScreen ws = new WelcomeScreen();
DialogResult dResult = ws.ShowDialog();
switch (dResult)
{
case DialogResult.Yes: // practice mode
programMode = ProgramMode.Practice;
this.Text += " Practice Mode";
break;
case DialogResult.No: // evaluation mode
programMode = ProgramMode.Eval;
resultsShow.Visible = false;
pplotShowHide.Enabled = false;
this.Text += " Evaluation Mode";
pplotShowHide.Enabled = false;
break;
}
if (dResult != DialogResult.Cancel)
{
// get student parameters
si.stName = ws.stName;
si.stID = ws.stID;
si.stCourse = ws.stCourse;
si.stEmail = ws.stEmail;
si.stProf = ws.stProf;
// show the students name in title (if available
if (si.stName != string.Empty)
Text += " Clinician: " + si.stName;
// construct and show children
admtr = new Audiometer(
new Audiometer.presentationDelegate(presFunc),
new Audiometer.stateChangedDelegate(stChang));
admtr.MdiParent = this;
admtr.Show();
admtr.Location = new Point(0, 0);
admtr.Size = new Size(661, 460);
// Patient Window
//ptwind = new PatientWindow(pt); //Changes made 04/12/2011
ptwind = new PatientWindow();
ptwind.MdiParent = this;
ptwind.Show();
ptwind.Location = new Point(0, admtr.Height);
ptwind.Size = new Size(400, 450);
adgrm = new Audiogram();
adgrm.vltl = this;
adgrm.patient = pt; // delete me
adgrm.MdiParent = this;
adgrm.Show();
adgrm.Location = new Point(admtr.Width,0);
adgrm.SpAudInput.MdiParent = this;
adgrm.SpAudInput.Location = new Point(750, 496);
pplot = new Plateau_Plot.Plateau_Plot();
pplot.MdiParent = this;
pplot.Show();
pplot.Location = new Point(adgrm.Width, adgrm.Height);
pplot.Visible = false;
// SRT
srtWind = new SRT.SRT(
new SRT.SRT.ResponseDelegate(DoResponse),
new SRT.SRT.DoneDelegate(EnableSpeechMenu));
srtWind.MdiParent = this;
srtWind.Location = new Point(750, 496);
srtWind.Hide();
// WI
wiWind = new WI.WI(
new WI.WI.DoneDelegate(EnableSpeechMenu),
new WI.WI.ResponseDelegate(DoResponse));
wiWind.MdiParent = this;
wiWind.Location = new Point(750, 496);
wiWind.Hide();
// show form
this.Visible = true;
WindowState = System.Windows.Forms.FormWindowState.Maximized;
prevState = admtr.ameterSettings;
} // end if ( dResult != Cancel )
}
public void CheckMinimum(int frequencyIndex, Audiometer.channelSettings TestChannel, Audiometer.channelSettings MaskChannel)
{
if (MaskChannel.interrupt == false)
return;
int ear = MaskChannel.route == Ear.left ? 0 : 1;
int trans = TestChannel.trans == Audiometer.TransducerType.Bone ? 0 : 1;
if (StudentMaskedMinimums[frequencyIndex, trans, ear] > MaskChannel.volume)
StudentMaskedMinimums[frequencyIndex, trans, ear] = MaskChannel.volume;
}
