QUESTIONS 415 



Sound. Sounds which arise as the result of impact 

 and transmission of the effects of sound waves are 

 said to possess intensity, pitch, and quality or tone. 



Intensity. When we speak of the intensity of a 

 sound it means the loudness. 



Pitch. Pitch of a sound depends upon the number 

 of vibrations which strike the ear in a unit of time, a 

 second. The greater the number of vibrations the 

 higher the pitch and vice versa. 



Quality. Quality of a sound depends upon the 

 form of the vibration. The form of the sound wave 

 in any given instance is the resultant of a combination 

 of a fundamental vibration and certain secondary 

 vibrations of subdivisions of the vibrating body. 

 These secondary vibrations give rise to what is know T n 

 as overtones. By their union with and modification of 

 the fundamental vibration there is produced a special 

 form of vibration which gives rise not to a simple but 

 to a composite sensation. It is for this reason that the 

 same note of the piano, the violin, and the human 

 voice varies in quality (Brubaker). 



QUESTIONS 



1. Name some of the ordinary sensations. 



2. Name some of the special sensations. How do they arise? 



3. Name the special senses. 



4. What structures are essential for the appreciation of the 

 sense of touch? 



5. Name some of the end-organs concerned in the sense of 

 touch. 



6. Where are the corpuscles of Meissner located? Of Vater? 



7. What do you understand by the sense of touch? 



8. Name the senses possessed by the skin. 



9. What does the individual perceive by the muscle sense? 



10. What structures are essential to the sense of smell? 



11. Bound the nasal fossae. 



12. Name the two portions into which the mucous membrane of 

 the nasal fossa? is divided. 



13. What type of epithelium is found in the olfactory portion 

 of the nasal mucous membrane? 



14. Name the appendages of the eye. 



