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683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
When measured at the DAI:
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.4.2 Procedure | a) A sine-wave signal with a frequency in the range 1 004 Hz to 1 025 Hz is applied to the MRP. The level of this signal is adjusted until the level at the DAI output (pin 23) of the MS or at the analogue or digital output of the reference speech decoder of the SS corresponds to ‑10 dBm0. The level of the signal at the... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.5 Test requirement | The ratio of signal to total distortion power measured with the psophometric noise weighting (see table 4/ ITU-T G.223) shall be above the limits given in table 30.3.
Table 30.3
dB relative to ARL
Level ratio
‑35 dB
17,5 dB
‑30 dB
22,5 dB
‑20 dB
30,7 dB
‑10 dB
33,3 dB
0 dB
33,7 dB
7 dB
31,7 dB
10 dB
25,5 dB
Limits for ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2 Receiving | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.1 Definition | The receive signal to total distortion ratio is a measure of the linearity in the receive equipment (excluding the speech decoder). |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.2 Conformance requirement | The ratio of signal to total distortion power in the receiving direction measured at the ERP or DRP according to the Terminal Supplier's request with psophometric filter shall be above the limits given in 3GPP TS 03.50; subclause 3.9.2, table 5.
3GPP TS 03.50; subclause 3.9.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.3 Test purpose | To verify that the ratio of signal to total distortion power in the receiving direction measured at the ERP or DRP according to the Terminal Supplier's request with psophometric filter is above the limits given in 3GPP TS 03.50; subclause 3.9.2, table 5. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.4.2 Procedure | a) The SS sends, via the DAI (Pin 25), a PCM bit stream simulating a sine-wave signal with a frequency in the range 1 004 Hz to 1 025 Hz corresponding to ITU-T O.132 at the following levels: ‑45 dBm0, ‑40 dBm0, ‑35 dBm0, ‑30 dBm0, ‑25 dBm0, ‑20 dBm0, ‑15 dBm0, ‑10 dBm0, ‑5 dBm0, 0 dBm0.
b) The ratio of signal to total ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.5 Test requirement | The ratio of signal to total distortion power measured at the artificial ear with the psophometric noise weighting (see table 4/ ITU-T Recommendation G.223) shall be above the limits given in table 30.4.
Table 30.4
Level at the digital audio interface
Level ratio
‑45 dBm0
17,5 dB
‑40 dBm0
22,5 dB
‑30 dBm0
30,5 dB
‑20 d... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8 Sidetone distortion | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.1 Definition | The sidetone distortion expresses the linearity of the sidetone path in the handset. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.2 Conformance requirement | The third harmonic distortion of the sidetone shall not be greater than 10 %.
3GPP TS 03.50; subclause 3.10.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.3 Test purpose | To verify that the third harmonic distortion of the sidetone is not greater than 10 %. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.4.1 Initial conditions | The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.4.2 Procedure | a) The SS sends the PCM bit stream coded with the value No 1 over the DAI (pin 25) to the MS.
b) An instrument capable of measuring the third harmonic distortion of signals with fundamental frequencies in the range 315 Hz to 1 000 Hz is connected to the artificial ear.
c) A pure-tone signal of ‑4,7 dBPa is applied at t... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.5 Test requirement | The third harmonic distortion generated shall not be greater than 10 %. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9 Out-of-band signals | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1 Sending | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.1 Definition | The discrimination against out-of-band input signals in the sending direction is a requirement on the in-band image frequencies created by any out-of-band input signals. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.2 Conformance requirement | With any sine wave signal above 4,6 kHz and up to 8 kHz applied at the MRP at a level of ‑4,7 dBPa, the level of any image frequency produced at the digital interface shall be below a reference level obtained at 1 kHz (‑4,7 dBPa at MRP) by at least the amount (in dB) specified in 3GPP TS 03.50; subclause 3.11.1, table ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.3 Test purpose | To verify that the conformance requirement is met for input signals with frequencies of 4,65 kHz, 5 kHz, 6 kHz, 6,5 kHz, 7 kHz and 7,5 kHz. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.4.2 Procedure | a) A pure tone with a sound pressure of ‑4,7 dBPa is applied at the mouth reference point as described in ITU-T Recommendation P.64 using an artificial mouth conforming to ITU-T Recommendation P 51.
b) For input signals at frequencies of 4,65 kHz, 5 kHz, 6 kHz, 6,5 kHz, 7 kHz, and 7,5 kHz, the level represented by the ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.5 Test requirement | The level of any image frequency shall be below a reference obtained at 1 kHz by at least the amount as specified in table 30.5.
Table 30.5
Applied sine-wave frequency
Limit (minimum)
4,6 kHz
30 dB
8 kHz
40 dB
Limits for the image frequency discrimination.
The limit at intermediate frequencies lies on a straight line d... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2 Receiving | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.1 Definition | The discrimination against out-of-band signals in the receiving direction is a requirement on the out-of-band signals generated in the artificial ear from in-band input signals. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.2 Conformance requirement | With a digitally simulated sine wave signal in the frequency range of 300 Hz to 3,4 kHz and at a level of 0 dBm applied at the digital interface, the level of spurious out-of-band image signals in the frequency range of 4,6 to 8 kHz measured selectively in the artificial ear shall be lower than the in-band acoustic lev... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.3 Test purpose | To verify that the conformance requirement is met for input signals at the nominal frequencies 500 Hz, 1 000 Hz, 2 000 Hz and 3 350 Hz. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.4.2 Procedure | a) The SS sends over the DAI (pin 25) a PCM bit stream simulating a sine-wave signal with a level of 0 dBm0.
b) For input signals at the nominal frequencies 500 Hz, 1 000 Hz, 2 000 Hz and 3 350 Hz (bearing in mind the restriction on sub-multiples of the sampling frequency) the level of any out-of-band signals at freque... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.5 Test requirement | The level of out-of-band signals shall be lower than the in-band acoustic level obtained by a digital signal at 1 kHz set at the level specified in table 30.6.
Table 30.6
Image signal frequency
Equivalent input signal level
4,6 kHz
‑35 dBm0
8 kHz
‑45 dBm0
Limits for the image frequency discrimination.
The limit at inte... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10 Idle channel noise | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1 Sending | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.1 Definition | The idle channel noise in the sending direction is the equivalent noise level produced at the DAI, when the mouth reference point is in a quiet environment. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.2 Conformance requirement | The idle noise in the sending direction shall not exceed - 64 dBm0p at the UPCMI under silent conditions.
3GPP TS 03.50; subclause 3.6.1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.3 Test purpose | To verify that the idle noise in the sending direction does not exceed -64 dBm0p at the UPCMI under silent conditions. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51 in a quiet environment (ambient noise less than 30 dBA).
The DAI of the MS is connected to the SS and is set to the operating mode "Tes... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.4.2 Procedure | The noise level represented by the PCM bit stream output at the DAI (pin 23) is measured with psophometric weighting according to ITU-T Recommendation G.223, table 4.
NOTE: The ambient noise criterion should be met if the ambient noise does not exceed NR20. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.5 Test requirement | The noise produced by the MS in the sending direction shall not exceed ‑64 dBm0p. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2 Receiving | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.1 Definition | The idle channel noise in the receiving direction is the acoustic sound pressure in the artificial ear when the digital input signal at the DAI, is the PCM coded value No 1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.2 Conformance requirement | 1. If no user controlled receiving volume control is provided, or if it is provided, at the setting of the user controlled receiving volume at which the RLR is equal to the nominal value, the noise measured in the artificial ear contributed by the receiving equipment alone shall not exceed -57 dBPa (A) when driven by a... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.3 Test purpose | 1. To verify that the idle noise in the receiving direction does not exceed -57 dBPa (A). If a user controlled receive volume control is provided it shall be set to the position where RLR is equal to the nominal value.
2. To verify that if a user controlled receive volume control is provided, the idle noise in the rece... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.4.2 Procedure | a) The SS sends a PCM bit stream coded with the value No 1 over the DAI (Pin 25) to the MS.
b) The level of the noise is measured in the artificial ear with any volume control set at the position at which the RLR is equal to the nominal value.
c) Where a volume control is provided, the level of the noise is measured in... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.5 Test requirement | In step b) the measured noise generated by the MS shall not exceed ‑57 dBPa (A).
In step c) the measured noise shall not exceed ‑54 dBPa (A). |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11 Ambient Noise Rejection | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11.1 Definition | An MS that supports speech will typically be operated within an area of high ambient acoustic noise. A level of noise rejection will therefore be required. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11.2 Conformance Requirement | Compliance shall be checked by calculating the single figure DELSM (SFDELSM) according to the following formula, the SFDELSM shall be 0 dB.
where:
n = the third octave band centre frequencies from 160 Hz to 3 150 Hz inclusive.
Deln = is the 1/3 octave band pressure level centred on the nth frequency.
Wm = is the SLR ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11.3 Test Purpose | To verify that ambient noise calculated as SFDELSM shall be rejected, by verifying that SFDELSM 0 dB. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11.4 Method of Test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11.4.1 Initial Conditions | A 1/2 inch pressure microphone is calibrated using a known sound source and mounted at the MRP, without the LRGP head present. A frequency analyser is calibrated to enable the sound pressure levels at the microphone to be determined in 1/3rd octave bands.
Flood the room in which the measurement is to be made with the s... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11.4.2 Procedure | Set up a full rate speech path between the MS and the SS.
The SS determines, as a function of frequency, using the frequency analyser, in 1/3rd octave bands, the electrical output Vrn, (expressed as dB rel 1V) at the audio output of the SS for the applied acoustic pressure Prn (expressed as dB rel 1Pa) at the MRP. Sinc... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.11.5 Test Requirement | The MS ambient noise rejection, calculated as a single figure DELSM (SFDELSM) shall be greater than or equal to 0 dB. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.12 Sending sensitivity/frequency response | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.12.1 Definition | The sending sensitivity frequency response is, as a function of the input test signal frequency, the ratio expressed in dB between the output level at the Digital Audio Interface (DAI) or at the audio output of the reference speech decoder of the SS and the input sound pressure in the artificial mouth required to obtai... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.12.2 Conformance requirement | The sending sensitivity frequency response shall be within the mask given in 3GPP TS 26.131.
3GPP TS 26.131, subclause 5.4.1, table 1 |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.12.3 Test purpose | To verify that the sending sensitivity frequency response is conforming to the specification in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.12.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.12.5 Test requirement | The sending sensitivity frequency response shall be within the mask specified in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.13 Sending loudness rating | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.13.1 Definition | The Sending Loudness Rating (SLR) is a means of expressing the sending frequency response based on objective measurements in a way which relates to how a speech signal would be perceived by a listener. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.13.2 Conformance requirement | The conformance requirement shall be as specified in 3GPP TS 26.131.
3GPP TS 26.131; subclause 5.2.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.13.3 Test Purpose | To verify that the Sending Loudness Rating (SLR) is conforming to the specification in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.13.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.13.5 Test requirement | The Sending Loudness Rating (SLR) shall be within the limits specified in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14 Receiving sensitivity/frequency response | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14.1 Definition | The receiving sensitivity frequency response is, as a function of the input test signal frequency, the ratio expressed in dB between the output sound pressure in the artificial ear and the input level, represented by the PCM bit stream at the Digital Audio Interface (DAI) or the level at the SS audio input, required to... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14.2 Conformance requirement | When measured with the type 1 artificial ear (only release 4 handsets) the receiving sensitivity frequency response shall be within the mask given in 3GPP TS 43.050.
3GPP TS 43.050; subclause 6.8.1.2, table 2.
When measured with 3.x artificial ear (release 4 and later handsets) the receiving sensitivity frequency resp... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14.3 Test purpose | To verify that the receiving sensitivity frequency response is within the mask given in 3GPP TS 43.050; subclause 3.8.1.2, table 2 when measured with the type 1 artificial ear (release 4 handsets only) or within the mask given in 3GPP TS 26.131; subclause 5.4.2, table 2 when measured with a type 3.x artificial ear. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14.4.1 Initial conditions | When measured from the DAI:
a) The handset is mounted in the LRGP and the earpiece is sealed to the knife-edge of the artificial ear.
b) A digital signal generator is connected at the digital interface delivering a signal equivalent to a pure tone level of ‑16 dBm0, see ITU-T Recommendation P.64.
c) The DAI of the MS i... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14.4.2 Procedure | When measured from the DAI:
- Measurements are made at one twelfth-octave intervals as given in the R.40 series of preferred numbers in ISO 3 for frequencies from 100 Hz to 4 kHz inclusive. At each frequency, the sound pressure in the artificial ear is measured by connecting a suitable measuring set to the artificial e... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.14.5 Test requirement | When measured in the type 1 artificial ear (allowed for release 4 handsets only) the receiving sensitivity/frequency response shall be within the mask given by table 30.8. The mask can be drawn with straight lines between the breaking points in the following table on a logarithmic (frequency) vs linear (dB sensitivity)... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.15 Receiving loudness rating | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.15.1 Definition | The Receiving Loudness Rating (RLR) is a means of expressing the receiving frequency response based on objective measurements in a way which relates to how a speech signal would be perceived by a listener. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.15.2 Conformance requirement | 3GPP TS 26.131; subclause 5.2.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.15.3 Test purpose | To verify that the Receiving Loudness Rating (RLR) is conforming to the specification in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.15.4 Method of test | The test method shall be as specified in 3GPP TS 26.132 section 7.2.2.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.15.5 Test requirement | The Receiving Loudness Rating (RLR) shall be within the limits specified in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.16 Side Tone Masking Rating (STMR) LRGP | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.16.1 Definition | The sidetone loudness ratings are a means of expressing the path loss from the artificial mouth to the artificial ear based on objective single tone measurements in a way that relates to how a speaker will perceive his own voice when speaking (talker sidetone, expressed by the sidetone masking rating - STMR), or how a ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.16.2 Conformance requirement | The conformance requirement is specified in 3GPP TS 26.131.
3GPP TS 26.131; subclause 5.5.1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.16.3 Test purpose | To verify that the requirement for STMR stated in TS 26.131 is met. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.16.4 Method of test | The test method shall be as specified in 3GPP TS 26.132 section 7.5.1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.16.5 Test requirement | The STMR shall be within the limits specified in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.17 Telephone Acoustic coupling Loss (TAL) | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.17.1 Echo Loss (EL) | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.17.1.1 Definition | The echo loss is the path loss from the input of the reference speech encoder of the SS to the output of the reference speech decoder of the SS. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.17.1.2 Conformance requirement | The echo loss from the input to the output of the reference speech codec in the SS shall be as specified in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.17.1.3 Test purpose | To verify that the echo loss from the input to the output of the reference speech codec in the SS is as specified in 3GPP TS 26.131. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.17.1.4 Method of test | The method of test shall be as specified in 3GPP TS 26.132. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.17.1.5 Test requirement | The echo loss from the input to the output of the reference speech codec in the SS shall be as specified in 3GPP TS 26.131. |
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