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RM500SL

User's Guide Version 3.4



June 2011

REDD, Real-Ear-to-Dial Difference

, difference, in dB as a function of frequency,

between the SPL (or BSPL) measured at the eardrum and the audiometer dial setting that
produced it. It is specific to the client, headphone and audiometer used to generate it.

REIG, Real-Ear Insertion Gain, difference

, in dB as a function of frequency, between

the REAG and the REUG taken with the same measurement point and the same sound field
conditions. REIG = REAG – REUG. ANSI S3.46.

REOG, Real-Ear Occluded Gain

, difference, in dB as a function of frequency, between

the SPL (or BSPL) at a specified measurement point in the ear canal and the SPL (or BSPL)
at the field reference point, for a specified sound field, with the hearing aid in place and
turned off (ANSI S3.46).

REOR, Real-Ear Occluded Response

, SPL (or BSPL), as a function of frequency, at a

specified measurement point in the ear canal, for a specified sound field, with the hearing
aid in place and turned off (ANSI S3.46). The REOR is used to evaluate the seal of an
earmold. It is not related to the required gain of a hearing aid.

REUG, Real-Ear Unaided Gain

, difference, in dB as a function of frequency, between the

SPL (or BSPL) at a specified measurement point in the ear canal and the SPL (or BSPL) at a
field reference point, for a specified sound field, with the ear unoccluded (ANSI S3.46).

REUR, Real-ear Unaided Response

, SPL (or BSPL), as a function of frequency, at a

specified measurement point in the ear canal, for a specified sound field, with the ear canal
unoccluded (ANSI S3.46).

Reference microphone

, microphone used to measure the stimulus level in the

measurement process or to control it in the equalization process.

Release Time

, the time required for HA output to fall to /-4dB of its steady-state

level for an input step from 90 to 55dB SPL. (ANSI S3.22)

REM

, Real-ear Measurement.

RTG, Reference Test Gain

, the HFA gain for a 60 dB input SPL with the gain control at

RTS (ANSI S3.22).

Reference

, Sound-field, the calibration point of a sound-field measurement.

RSETS, Relative Simulated Equivalent Telephone Sensitivity

, difference in dB

between the HFA-SPLITS (SPA-SPLITS) and the RTG plus 60 in the ‘M’ (microphone) mode.
RSETS = HFA-SPLITS - (RTG+60)

RTS, Reference Test Setting of the gain control

, for a 60 dB input SPL, the setting of

the gain control required to produce an HFA gain within 1.5 dB of the HFA-OSPL90 minus
17 dB. If the full-on HFA gain is less than the HFA-OSPL90 minus 17 dB, the RTS is the full-
on setting of the gain control (ANSI S3.22).

Saturation

, in a hearing aid, the limiting of output caused by the output circuitry and

transducer reaching their maximum capability.

SPA, Special Purpose Average

, the average of values in dB at three third octave

frequencies separated by 2/3 of an octave (ANSI S3.22). See also HFA.

Spectrum

, the BSPL as a function of frequency for a broad-band signal.

SII, Speech Intelligibility Index

, a quantity calculated from measures of speech, noise

and hearing threshold that is highly correlated with the intelligibility of speech (ANSI S3.5).

Speech Region