## 5.4.5 Hand-held hands-free UE sending

26.1313GPPRelease 17RequirementsTerminal acoustic characteristics for telephonyTS

The sending sensitivity frequency response from the MRP to the SS audio output (digital output of the reference speech decoder of the SS) shall be as follows:

The sending sensitivity frequency response shall be within the mask which can be drawn with straight lines between the breaking points in table 5 on a logarithmic (frequency) – linear (dB sensitivity) scale.

Table 5: Hand-held hands-free sending sensitivity/frequency mask

 Frequency (Hz) Upper limit (dB) Lower limit (dB) 100 ‑12 200 0 300 0 ‑12 1 000 0 ‑6 2 000 4 ‑6 3 000 4 ‑6 3 400 4 ‑9 4 000 0 NOTE: All sensitivity values are expressed in dB on an arbitrary scale.

Figure 5: Hand-held hands-free sending sensitivity/frequency mask

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