HP RM500SL manual Glossary

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22 Glossary

AGC, Automatic Gain Control, the means by which gain is automatically controlled by the level of the signal being amplified. (ANSI S3.22)

AGC-I, input-controlled AGC (see "input compression").

AGC-O, output controlled AGC (see "output compression").

AGRAM, Abbreviation for audiogram.

ANSI, American National Standards Institute.

Attack Time, the time required for HA output to reach +/- 3dB of its steady state level in response to an input step from 55 to 90dB SPL. (ANSI S3.22)

ASP, Automatic Signal Processing, In hearing aids, level dependent frequency response shaping.

AVC, Automatic Volume Control, slow-acting AGC that attempts to maintain a constant average signal level.

BSPL, Band Sound Pressure Level, the SPL within a restricted frequency band. BTE, Behind-The-Ear (hearing aid).

Compression, a type of AGC in which an incremental change in the input level produces a smaller incremental change in the output level.

CR, Compression Ratio, the ratio of incremental change in input SPL to the resulting incremental change in output SPL. Used to characterize steady state AGC action; can be a function of input level, duration and frequency.

CROS, Contralateral Routing Of Signals; a type of hearing aid in which the microphone is at the ear opposite to the one receiving the amplified sound.

CORFIG, Coupler Response for Flat Insertion Gain; the transformation added to real-ear insertion gain to obtain 2-cc coupler gain. Assumes linear amplification.

Coupler, a device used to acoustically couple an earphone or hearing aid to a measurement microphone and to provide an acoustic load.

DSL, Desired Sensation Level Method, a systematic eardrum (SPLogram) approach to the hearing aid fitting process that seeks to ensure amplified speech will be audible and comfortable while loud sounds will not be uncomfortable.

Directional hearing aid, a hearing aid for which the gain is dependent on the direction of sound incidence when measured under free-field conditions (ANSI S3.22).

Equalization, process of controlling the SPL (or band SPL) of the stimulus, as a function of frequency, at the field reference point (ANSI S3.46).

Expansion, a type of AGC in which an incremental change in the input level produces a larger incremental change in the output level.

FM, frequency modulation, a method of transmitting information in which the frequency of a radio wave (carrier) is varied (modulated) by the information (signal). Also, a method of reducing standing waves in a sound field in which the frequency of a test tone (carrier) is varied by a low frequency triangle or sine wave.

FM System, an assistive listening device consisting of a microphone, an fm radio transmitter and an fm receiver. The microphone and transmitter are worn by the speaker and the receiver is worn by the listener.

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Contents USER’S Guide Getting Started Table of ContentsGeneral Setup General OperationAnsi S3.22 Hearing Aid Tests Hearing Instrument Tests SetupOther Hearing Instrument Tests REM Manual Control Troubleshooting Speechmap Fitting ProceduresSpeechmap Technical Details Section overview About RM500SLHelp is available on the following topics by pressing Help FastFacts 1.3 Electronic users guide Warranty, Trademarks, Acknowledgements FastFacts 1.4 Warranty, trademarks, acknowledgementsElectromagnetic Compatability EMC CisprGetting Started FastFacts 2.1 Getting started Unpacking and connectingFastFacts 2.2 Unpacking and connecting Following topics are covered in this sectionMicrophone connection FastFacts 2.3 Microphone connectionMicrophone care Coupler microphone FastFacts 2.4 Microphone care Battery pill use and careFastFacts 2.5 Battery pill use and care Probe microphoneMouse, keyboard, barcode scanner FastFacts 2.6 Mouse, keyboard, barcode scannerFastFacts 2.7 External printer, auxiliary audio outputs General OperationExternal printer, auxiliary audio outputs Section overview This section covers the following topicsFunction Keypad Input device operationFastFacts 3.2 Input device operation Barcode data input FastFacts 3.3 Barcode data inputKeypad keys Function Button FastFacts 3.4 Keypad keysMenus, lists and buttons Setup Box List Box FastFacts 3.5 Menus, lists and buttonsFastFacts 3.7 Program memory removal and replacement Screen messagesFastFacts 4.2 Date and time setup General SetupFastFacts 4.1 General setup Date and time setup Software updatingFastFacts 4.3 Display settings Saving test setup Display settingsFastFacts 4.4 Saving test setup FastFacts 5.1 Networking Networking requirements NetworkingFastFacts 5.2 Networking requirements Networking setup FastFacts 5.3 Networking setupOn the RM500SL, see Single computer connectionFastFacts 5.4 Single computer connection Printing and Storing Results FastFacts 6.1 Printing and storing resultsTo load a new roll of paper Internal printer paper loadingFastFacts 6.2 Internal printer paper loading FastFacts 6.4 Local printer setup Barcodes, headers and comments on printoutsPrinting to a USB memory stick FastFacts 6.5 Printing to a USB memory stickNetwork printer setup FastFacts 6.6 Network printer setupPrinting to a network file FastFacts 6.8 Data storage to a network fileFastFacts 7.3 Graph or table format Output or gain scale Hearing Instrument Tests SetupFastFacts 7.2 HIT a or B display Graph or table format FastFacts 7.4 Output or gain scaleTo change the averaging frequencies Hide or Show HIT curvesFastFacts 7.7 Ansi test frequencies HIT calibration facts FastFacts 7.8 HIT calibration factsFastFacts 7.9 Calibration of HIT reference microphone Calibration check for coupler microphone FastFacts 7.10 Calibration check for coupler microphoneCoupling the hearing instrument Positioning the hearing instrument FastFacts 7.12 Positioning the hearing instrumentAnsi S3.22 Hearing Aid Tests FastFacts 8.2 Ansi S3.22-1996 factsTurn the instrument on Ansi S3.22-2003 factsFastFacts 8.4 Ansi 1996 Linear and AGC tests Ansi 2003 Linear and AGC tests FastFacts 8.5 Ansi 2003 Linear and AGC testsAnsi test results FastFacts 8.6 Ansi test resultsAnsi input-output curves FastFacts 8.7 Ansi input-output curvesAnsi telecoil terminology FastFacts 8.8 Ansi telecoil terminologyAnsi telephone simulator Tmfs test FastFacts 8.9 Ansi telephone simulator Tmfs testTelecoil test results FastFacts 8.10 Telecoil test resultsTurn the hearing instrument on Other Hearing Instrument TestsFastFacts 9.2 Harmonic distortion FastFacts 9.3 Multicurve procedure Multicurve results Multicurve procedureFastFacts 9.4 Multicurve results FastFacts 9.6 Battery drain test Spectral analysis in MulticurveManual control procedure FastFacts 9.8 Sound level meter using manual controlReal-Ear Measurement Setup FastFacts 10.2 REM calibration factsCalibration of REM probe microphone FastFacts 10.3 Calibration of REM probe microphoneCalibration check for probe module FastFacts 10.5 Max TM SPL setup 10.6 ABR nHL to eHL setup Max TM SPL setupFastFacts 10.6 ABR nHL to eHL setup Positioning the client FastFacts 10.8 Positioning the probe tubeREM Screen Setup FastFacts 11.3 Graph, table or 2cc target formatFastFacts 11.4 SPL or HL scale Hide or show REM curves REM Manual ControlSPL or HL scale FastFacts 11.5 Hide or show REM curvesFastFacts 12.3 Sound level meter using REM probe Manual control measurementsSensory loss simulator description Sensory Loss SimulatorFastFacts 13.2 Sensory loss simulator operation Turn the hearing aid OFF Occlusion Effect TestOcclussion effect measurement FastFacts 14.1 Occlusion effect measurementRecd real-ear to coupler difference FastFacts 15.2 Recd factsRecd coupler response FastFacts 15.3 Recd coupler responseAllow the foam tip to fully expand in the ear Recd real-ear responseFastFacts 15.4 Recd real-ear response Recd results FastFacts 15.5 Recd resultsFastFacts 16.1 Insertion gain Insertion gain in SPL Insertion GainFastFacts 16.2 Insertion gain in SPL Insertion gain in HL FastFacts 16.3 Insertion gain in HLTo enter assessment data and parameters manually Audiometric data entryTo enter data from a barcode see 3.3 Barcode data input FastFacts 16.4 Audiometric data entryReur measurement procedure FastFacts 16.5 Reur measurement procedureRear measurement procedure FastFacts 16.6 Rear measurement procedureSII calculation in Insertion gain FastFacts 16.7 SII calculation in Insertion gainFastFacts 17.1 Speechmap 17.2 Speechmap facts SpeechmapFastFacts 17.2 Speechmap facts DSL 5.0 in Speechmap FastFacts 17.3 DSL 5.0 in SpeechmapFastFacts 17.4 DSL 5.0 changes NAL-NL1 in Speechmap DSL 5.0 changesFastFacts 17.5 NAL-NL1 in Speechmap FastFacts 17.6 Using Speechmap Using SpeechmapTo enter audiometric data, see 18.2 Assessment data entry 0611 RM500SL User’s Guide Version REM or S-REM mode FastFacts 17.9 REM or S-REM mode17.10SII calculation in Speechmap FastFacts 17.10 SII calculation in SpeechmapTo enter assessment data manually Speechmap Fitting ProceduresFastFacts 18.2 Assessment data entry Assessment data choices FastFacts 18.3 Assessment data choicesFrom 18.3 Assessment data choices FastFacts 18.4 Assessment data choicesFitting to targets for soft speech FastFacts 18.5 Fitting to targets for soft speechFitting to targets for loud sounds FastFacts 18.6 Fitting to targets for loud soundsFitting to targets for mid-level speech FastFacts 18.8 Open fittings in SpeechmapFM fitting and verification FastFacts 18.9 FM fitting and verificationSpeechmap Technical Details FastFacts 19.2 Speechmap stimuliStimulus levels FastFacts 19.3 Stimulus levelsMicrophone location effects Microphone Location Effects FastFacts 19.4 Microphone location effectsSpeech signal analysis FastFacts 19.5 Speech signal analysisFastFacts 20.1 Troubleshooting Self test failures TroubleshootingFastFacts 20.2 Self test failures FastFacts 20.4 HIT curves inconsistent No HIT reference mic. detected FastFacts 20.7 No HIT reference mic. detectedInvalid HIT calibration Invalid HIT Calibration FastFacts 20.10 Invalid REM calibration20.11REM speaker overdriven FastFacts 20.12 Barcode scanner malfunctionGeneral Technical SpecificationsStorage & Transportation HIT ChamberGlossary Page Page Page References Page Page 0611 RM500SL User’s Guide Version Test signals Verifit and RM500SL Test Signals and AnalysisIntroduction Broad-band signals Loud Vocal Effort Effect re nominal band SPL Analysis of broad-band signals Pink noise signal analysisVerifit / 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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