7.4.1 Handset and headset UE sending

26.1313GPPRelease 18RequirementsTerminal acoustic characteristics for telephonyTS

The sensitivity/frequency characteristics shall be as follows:

The sending sensitivity frequency response, measured either from the mouth reference point (MRP) to the digital interface or from the MRP to the SS audio output (digital output of the reference speech decoder of the SS), shall be within a mask, which can be drawn between the points given in table 17.

The masks are drawn with straight lines between the breaking points in the tables on a logarithmic (frequency) – linear (dB sensitivity) scale.

Table 17: Handset and headset sending sensitivity/frequency requirement mask

Frequency (Hz)	Upper limit (dB)	Lower limit (dB)
100	4
200	4	-4
5000	4	-4
12500	4	-6
16000	4
NOTE: All sensitivity values are expressed in dB on an arbitrary scale.

Table 18: Void

Figure 15: Handset and headset sending sensitivity/frequency masks. The frequency response of the EVS codec operating as specified in TS 26.132 (super-wideband 24,4kbit/s, using the specified P.501 speech test signal), is plotted for reference, normalized to 0dB at 1kHz.

A UE operating in super-wideband mode shall pass the super-wideband requirements (i.e. when measured according to in 1/3rd octaves) as specified in Table 17, and shall also pass the wideband sensitivity/frequency characteristics requirements in the wideband range using the wideband measurement (i.e. measured in 1/12th octaves) as specified in Table 9.

Compliance shall be checked by the relevant test described in TS 26.132.