HP RM500SL manual

Page 95

FOG, Full On Gain, gain for a 50 dB input SPL with the gain control set to maximum ANSI S3.22)

Gain (in dB), output sound pressure relative to input sound pressure, expressed in decibels; gain = 20log10 (output sound pressure / input sound pressure); also, gain = (output SPL) - (input SPL).

Gain control, a manually or electronically operated control for the adjustment of overall gain (ANSI S3.22).

HA-1 Coupler, a coupler having a volume of 2 cubic centimetres with direct access to the cavity. Used for testing in-the-ear and in-the-canal hearing aids; can also be used to test behind-the-ear hearing aids with a custom earmold attached. Aka the ITE coupler.

HA-2 Coupler, a coupler having a volume of 2 cubic centimetres with access through a rigid tube. When used for testing BTE hearing aids, the rigid tube consists of 18 mm of 3 mm tubing plus 25 mm of 2 mm tubing (ANSI S3.22). When used for calibrating insert earphones, the 2 mm tubing is not used (ANSI S3.6). Aka the BTE coupler.

Harmonic, a component of a tone complex that is an integer multiple of the lowest frequency component (fundamental).

Harmonic Distortion, the addition of harmonic components to a signal. The rms value of a harmonic component of a signal as a percentage of the rms value of the fundamental. If less than 20%, the rms value of the total signal may be used instead of the fundamental.

HFA, High Frequency Average, the average of values in dB at 1000, 1600, and 2500 Hz. (ANSI S3.22).

HL, Hearing Level, the hearing threshold referenced to the threshold of normal hearing, expressed in dB.

HI, Hearing instrument.

HIT, Hearing instrument test.

Input Compression, a form of AGC in which the signal level is regulated before the volume control.

Input / Output function, steady state, single-frequency plot of the coupler SPL on the ordinate as a function of input SPL on the abscissa with equal decibel scale divisions on each axis (ANSI S3.22).

ITE, In-The-Ear (hearing aid).

Kneepoint (compression threshold), the point on an input/output curve at which the slope digresses from unity indicating the signal level at which a non-linear process begins to take effect.1

LCD, liquid crystal display. A thin, planar information display.

Linear Region, that portion of the input-output function which is a straight line at 45 degrees.

Linear Amplification, amplification having the same gain for all input levels until the maximum output of the device is reached.

LTASS, Long-term average speech spectrum, the rms level of a speech passage in 1/3rd octave bands, averaged over the entire passage.

Loop System, an assistive listening device that uses magnetic induction to carry a signal from a microphone/amplifier to a wire loop. The signal is picked up from the loop by a hearing aid set to the telecoil position or by a receiver with built-in telecoil, volume control, and earpiece. Loops are either worn around an individual's neck or can encircle a room, such as a classroom, providing an excellent signal-to-

noise ratio.1

MAF, minimum audible field, SPL of a tone at the threshold of audibility measured in a free sound field for a subject listening with both ears and facing the sound source. The SPL is measured with the subject removed from the field at the midpoint of an imaginary line joining the centers of the ear canal openings.

0611

RM500SL User’s Guide Version 2.8

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Contents USER’S Guide General Operation Table of ContentsGeneral Setup Getting StartedOther Hearing Instrument Tests Hearing Instrument Tests SetupAnsi S3.22 Hearing Aid Tests REM Manual Control Speechmap Technical Details Speechmap Fitting ProceduresTroubleshooting Help is available on the following topics by pressing Help About RM500SLSection overview FastFacts 1.3 Electronic users guide FastFacts 1.4 Warranty, trademarks, acknowledgements Warranty, Trademarks, AcknowledgementsCispr Electromagnetic Compatability EMCFollowing topics are covered in this section FastFacts 2.1 Getting started Unpacking and connectingFastFacts 2.2 Unpacking and connecting Getting StartedFastFacts 2.3 Microphone connection Microphone connectionProbe microphone FastFacts 2.4 Microphone care Battery pill use and careFastFacts 2.5 Battery pill use and care Microphone care Coupler microphoneFastFacts 2.6 Mouse, keyboard, barcode scanner Mouse, keyboard, barcode scannerSection overview This section covers the following topics General OperationExternal printer, auxiliary audio outputs FastFacts 2.7 External printer, auxiliary audio outputsFastFacts 3.2 Input device operation Input device operationFunction Keypad FastFacts 3.3 Barcode data input Barcode data inputFastFacts 3.4 Keypad keys Keypad keys Function ButtonFastFacts 3.5 Menus, lists and buttons Menus, lists and buttons Setup Box List BoxScreen messages FastFacts 3.7 Program memory removal and replacementSoftware updating General SetupFastFacts 4.1 General setup Date and time setup FastFacts 4.2 Date and time setupFastFacts 4.4 Saving test setup Display settingsFastFacts 4.3 Display settings Saving test setup FastFacts 5.2 Networking requirements NetworkingFastFacts 5.1 Networking Networking requirements FastFacts 5.3 Networking setup Networking setupFastFacts 5.4 Single computer connection Single computer connectionOn the RM500SL, see FastFacts 6.1 Printing and storing results Printing and Storing ResultsFastFacts 6.2 Internal printer paper loading Internal printer paper loadingTo load a new roll of paper Barcodes, headers and comments on printouts FastFacts 6.4 Local printer setupFastFacts 6.5 Printing to a USB memory stick Printing to a USB memory stickFastFacts 6.6 Network printer setup Network printer setupFastFacts 6.8 Data storage to a network file Printing to a network fileFastFacts 7.4 Output or gain scale Hearing Instrument Tests SetupFastFacts 7.2 HIT a or B display Graph or table format FastFacts 7.3 Graph or table format Output or gain scaleFastFacts 7.7 Ansi test frequencies Hide or Show HIT curvesTo change the averaging frequencies FastFacts 7.8 HIT calibration facts HIT calibration factsFastFacts 7.9 Calibration of HIT reference microphone FastFacts 7.10 Calibration check for coupler microphone Calibration check for coupler microphoneCoupling the hearing instrument FastFacts 7.12 Positioning the hearing instrument Positioning the hearing instrumentFastFacts 8.2 Ansi S3.22-1996 facts Ansi S3.22 Hearing Aid TestsFastFacts 8.4 Ansi 1996 Linear and AGC tests Ansi S3.22-2003 factsTurn the instrument on FastFacts 8.5 Ansi 2003 Linear and AGC tests Ansi 2003 Linear and AGC testsFastFacts 8.6 Ansi test results Ansi test resultsFastFacts 8.7 Ansi input-output curves Ansi input-output curvesFastFacts 8.8 Ansi telecoil terminology Ansi telecoil terminologyFastFacts 8.9 Ansi telephone simulator Tmfs test Ansi telephone simulator Tmfs testFastFacts 8.10 Telecoil test results Telecoil test resultsFastFacts 9.2 Harmonic distortion Other Hearing Instrument TestsTurn the hearing instrument on FastFacts 9.4 Multicurve results Multicurve procedureFastFacts 9.3 Multicurve procedure Multicurve results Spectral analysis in Multicurve FastFacts 9.6 Battery drain testFastFacts 9.8 Sound level meter using manual control Manual control procedureFastFacts 10.2 REM calibration facts Real-Ear Measurement SetupFastFacts 10.3 Calibration of REM probe microphone Calibration of REM probe microphoneCalibration check for probe module FastFacts 10.6 ABR nHL to eHL setup Max TM SPL setupFastFacts 10.5 Max TM SPL setup 10.6 ABR nHL to eHL setup FastFacts 10.8 Positioning the probe tube Positioning the clientFastFacts 11.3 Graph, table or 2cc target format REM Screen SetupFastFacts 11.5 Hide or show REM curves REM Manual ControlSPL or HL scale FastFacts 11.4 SPL or HL scale Hide or show REM curvesManual control measurements FastFacts 12.3 Sound level meter using REM probeFastFacts 13.2 Sensory loss simulator operation Sensory Loss SimulatorSensory loss simulator description FastFacts 14.1 Occlusion effect measurement Occlusion Effect TestOcclussion effect measurement Turn the hearing aid OFFFastFacts 15.2 Recd facts Recd real-ear to coupler differenceFastFacts 15.3 Recd coupler response Recd coupler responseFastFacts 15.4 Recd real-ear response Recd real-ear responseAllow the foam tip to fully expand in the ear FastFacts 15.5 Recd results Recd resultsFastFacts 16.2 Insertion gain in SPL Insertion GainFastFacts 16.1 Insertion gain Insertion gain in SPL FastFacts 16.3 Insertion gain in HL Insertion gain in HLFastFacts 16.4 Audiometric data entry Audiometric data entryTo enter data from a barcode see 3.3 Barcode data input To enter assessment data and parameters manuallyFastFacts 16.5 Reur measurement procedure Reur measurement procedureFastFacts 16.6 Rear measurement procedure Rear measurement procedureFastFacts 16.7 SII calculation in Insertion gain SII calculation in Insertion gainFastFacts 17.2 Speechmap facts SpeechmapFastFacts 17.1 Speechmap 17.2 Speechmap facts FastFacts 17.3 DSL 5.0 in Speechmap DSL 5.0 in SpeechmapFastFacts 17.5 NAL-NL1 in Speechmap DSL 5.0 changesFastFacts 17.4 DSL 5.0 changes NAL-NL1 in Speechmap To enter audiometric data, see 18.2 Assessment data entry Using SpeechmapFastFacts 17.6 Using Speechmap 0611 RM500SL User’s Guide Version FastFacts 17.9 REM or S-REM mode REM or S-REM modeFastFacts 17.10 SII calculation in Speechmap 17.10SII calculation in SpeechmapFastFacts 18.2 Assessment data entry Speechmap Fitting ProceduresTo enter assessment data manually FastFacts 18.3 Assessment data choices Assessment data choicesFastFacts 18.4 Assessment data choices From 18.3 Assessment data choicesFastFacts 18.5 Fitting to targets for soft speech Fitting to targets for soft speechFastFacts 18.6 Fitting to targets for loud sounds Fitting to targets for loud soundsFastFacts 18.8 Open fittings in Speechmap Fitting to targets for mid-level speechFastFacts 18.9 FM fitting and verification FM fitting and verificationFastFacts 19.2 Speechmap stimuli Speechmap Technical DetailsFastFacts 19.3 Stimulus levels Stimulus levelsFastFacts 19.4 Microphone location effects Microphone location effects Microphone Location EffectsFastFacts 19.5 Speech signal analysis Speech signal analysisFastFacts 20.2 Self test failures TroubleshootingFastFacts 20.1 Troubleshooting Self test failures FastFacts 20.4 HIT curves inconsistent FastFacts 20.7 No HIT reference mic. detected No HIT reference mic. detectedFastFacts 20.10 Invalid REM calibration Invalid HIT calibration Invalid HIT CalibrationFastFacts 20.12 Barcode scanner malfunction 20.11REM speaker overdrivenHIT Chamber Technical SpecificationsStorage & Transportation GeneralGlossary Page Page Page References Page Page 0611 RM500SL User’s Guide Version Introduction Verifit and RM500SL Test Signals and AnalysisTest signals Broad-band signals Loud Vocal Effort Effect re nominal band SPL Pink noise signal analysis Analysis of broad-band signalsVerifit / RM500SL Speechmap 07/05/06 Example of speech envelope and Ltass 07/05/06 Ltass for Speechmap speech signals at average vocal effort Ltass Dynamic
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