5.1.3 Setup for hands-free terminals
26.1323GPPRelease 18Speech and video telephony terminal acoustic test specificationTS
5.1.3.1 Void
5.1.3.2 Desktop hands-free
For HATS test equipment, the definition of hands-free terminals and setup for desktop hands-free terminals can be found in ITU-T Recommendation P.581. Measurement setup using a free-field microphone and a discrete P.51 [13] artificial mouth for desktop hands-free terminals can be found in ITU-T Recommendation P.340.The positioning for different types of desktop hands-free terminals is given in ETSI TS 103 738 [29] and ETSI TS 103 740 [31].
5.1.3.3 Hand-held hands-free
Either HATS or a free-field microphone with a discrete P.51 [13] artificial mouth may be used to measure a hand-held hands-free type UE.
If HATS measurement equipment is used, it shall be configured to the hand-held hands-free UE according to figure 4. The HATS should be positioned so that the HATS Reference Point is at a distance dHF from the centre point of the visual display of the Mobile Station. The distance dHF is specified by the manufacturer. A vertical angle HF may be specified by the manufacturer. Where it is not specified, the nominal distance dHF shall be 42 cm and HF shall be 0º.
NOTE: The nominal distance of 42 cm corresponds to the distance between the HATS reference point and lip-plane (12 cm) with an additional 30 cm giving a realistic figure as a reference usage of hand-held terminals.
Figure 4: Configuration of hand-held hands-free UE relative to the HATS
If a free-field microphone and a discrete P.51 [13] mouth are used, they shall be configured to the hand-held hands-free UE according to figure 5 for receiving measurements and figure 6 for sending measurements. The microphone should be located at a distance dHF from the centre of the visual display of the UE. The mouth simulator should be located at a distance dHF-12 cm from the centre of the visual display of the UE. The distance dHF is specified by the manufacturer. Where it is not specified the nominal distance dHF shall be 42 cm.
Figure 5: Configuration of hand-held hands-free UE; free-field microphone for receiving measurements
Figure 6: Configuration of hand-held hands-free UE; discrete P.51 artificial mouth for sending measurements
5.1.3.4 Softphone including speakers and microphone
This test setup is applicable to laptop computers or similar devices as seen in figure 7 through figure 11.
Where the manufacturer gives conditions of use, these will apply for testing. If the manufacturer gives no other requirement, the softphone will be positioned according the following conditions:
Measurement with artificial ear and microphone:
Artificial mouth (for sending tests)
Figure 7: Configuration of a softphone relative to the artificial mouth side view
Free field microphone (for receiving):
Figure 8: Configuration of a softphone relative to the free field microphone side view
Position of a softphone on the table:
Figure 9: Configuration of a softphone relative to the free-field microphone or artificial mouth viewed from above
Measurement with HATS:
Figure 10: Configuration of a softphone relative to the HATS side view
Figure 11: Configuration of a softphone relative to the HATS viewed from above
5.1.3.5 Softphone with separate speakers
This test setup is applicable to laptop computers or similar devices as seen in figure 12 through figure 15.
Where the manufacturer gives conditions of use, these will apply for testing. If the manufacturer gives no other requirement, the softphone will be positioned according to the following conditions:
Where separate loudspeakers are used, the system will be positioned as in figure 12 or figure 13.
Figure 12: Configuration of a softphone using external speakers relative to microphone or artificial mouth viewed from above
Figure 13: Configuration of a softphone using external speakers relative to the HATS viewed from above
Where an external microphone and speakers are used, the system will be positioned as in figure 14 or figure 15.
Figure 14: Configuration of a softphone using
external speakers and a microphone relative to microphone or artificial mouth viewed from above
Figure 15: Configuration of a softphone using
external speakers and a microphone relative to the HATS viewed from above