Workers in the Municipality of Tehran expose to high level of noises. The major sources of noise are the vehicles for garbage collection, Asphalt production and its usage in construction of pavements, Repairing motor vehicles, technical and constructive implementation including road and building construction , Forging, Concrete planning, Welding, Building structure and  etc.Although most of such activities are performed by Contractors, many workers are exposed to high levels of noise during such processes. Since hearing conservation program is a duty for the Municipality, we have managed to use some new protocols to prepare a convenient and quiet environment for workers that is going to be discussed here in the present article

Background and Aim: Understanding and defining developmental norms of auditory comprehension is a necessity for detecting auditory-verbal comprehension impairments in children. We hereby investigated lexical auditory development of Persian (Farsi) speaking children.
Methods: In this cross-sectional study, auditory comprehension of four 2-5 year old normal children of adult&aposs child-directed utterance at available nurseries was observed by researchers primarily to gain a great number of comprehendible words for the children of the same age. The words were classified into nouns, verbs and adjectives. Auditory-verbal comprehension task items were also considered in 2 sections of subordinates and superordinates auditory comprehension. Colored pictures were provided for each item. Thirty 2-5 year old normal children were randomly selected from nurseries all over Tehran. Children were tested by this task and subsequently, mean of their correct response were analyzed.
Results: The findings revealed that there is a high positive correlation between auditory-verbal comprehension and age (r=0.804, p=0.001). Comparing children in 3 age groups of 2-3, 3-4 and 4-5 year old, showed that subordinate and superordinate auditory comprehension of the former group is significantly lower (p<0.05) than the others . Intra-group comparisons revealed no significant difference between nouns, verbs and adjectives (p>0.05), while the difference between subordinate and superordinate auditory comprehension was significant in all age groups (p<0.05).
Conclusion: Auditory-verbal comprehension develop much faster at lower than older ages and there is no prominent difference between word linguistic classes including nouns, verbs and adjectives. Slower development of superordinate auditory comprehension implies semantic hierarchical evolution of words.

Background and Aim: Internal evaluation is an important part of organization monitoring. One of the Ministry of Health&aposs policies is to encourage educational departments to conduct internal evaluations. The aim of internal evaluation of department of speech therapy was appraising its education, research and treatment qualities and determining its strengths, weaknesses, opportunities and threats (SWOTs) to identify the ways of overcoming weakness and threats.
Methods: This descriptive cross-sectional study was conducted in 10 phases to evaluate 10 factors. Participants were undergraduate, graduate, and postgraduate students, academic staff, director of the department along with the patients. The internal evaluation software for educational and research centers released by Center of Medical Education Studies and Development was modified and utilized. Data was analyzed by calculating mean of means.
Results: Mean of means from highest to lowest scores were respectively as follows: the quality of diagnosis, treatment and dealing with patients 4.15 out of 5 as well as the quality of academic staff 3.5 were in the range of desirable category qualities of management and organizational structure 3.34, graduate students 3.21, teaching and learning processes 3.1, missions and goals 3.09, instructional methods and curriculum models 2.99, educational and research equipments 2.9, students 2.76 and research 2.67 were within the range of rather desirable category. Total score was 3.17 (63.4%) which was within the range of rather desirable category.
Conclusion: The department of speech therapy was in rather desirable state before merger. That result was appropriate according to the department&aposs conditions and supplies.