Question 12/XII - Artificial mouths and ears
(continuation of Question 12/XII studied in 19851988; new wording)

Considering

(a) that the increasing spread of oddly shaped earcaps which, besides
not coupling sometimes adequately to the human ear, also are measured
with difficulty according to the current procedures.

(b) that the appearance of intra-concha, circumaural, non-contact type
of earphones in telecommunications equipment, like operator headsets.

(c) that the results of the international experiment on the evaluation
of the human mouth radiation.

Administrations are requested to contribute on the following subjects:

1. a) Do the administrations consider that there is a need for a type of
artificial ear reproducing the acoustical, mechanical and geometrical
characteristics of the human ear?

b) If so, for what purpose should such a device be used?

c) What characteristics should it exhibit and how should these
characteristics be realized?

2. a) Do the administrations consider that there is a need for an
artificial ear for measuring without leakage intra-concha, circumaural
and non-contact type earphones, used in telecommunications equipment?

b) If so, what characteristics should it exhibit and how should these
characteristics be realized?

3. a) Should the artificial mouth be included in a HATS (Head and Torso
Simulator) in order to better reproduce the radiation characteristics of
the human mouth?

b) If so, for what purpose should such a device be used (hands free
sets, group audio terminals (GATs), operator headsets, telephone
handsets)?

c) What characteristics should it have and how should they be
implemented?

Note 1 - The annex describes the status of Question 12/XII at the end of
study period 1985-1988.

Note 2 - The results of the international experiment on the
characterization of the mouth radiation are summarized in COM XII-230
(1987). Machine readable diskettes with all the analytical data of the
experiment can be obtained from the Special Rapporteur of Q.12/XII.

Note 3 - Close collaboration with IEC is highly desirable.
ANNEX

(to Question 12/XII)

Refer to final status report on this Question in
Report COM XII-R 27, section B.4, February 1988