c c' c'' c''' - what is this notation called?

[quantum]

c c' c'' c''' - what is this notation called?  I've googled, but can't seem to find anything because I don't know it's name.  Also would you have a link to a guide of some sort to writing this notation. 

[Kassaa]

Retarded?

[al]

AB guide to music theory calls it pitch specifications.  To use it:

C' is three octaves below middle C
C is two octaves below middle C
c is an octave below middle C
c' is middle C
c'' is an octave above
c''' two octaves above etc.

the entire pitch range is A''' to c'''''

[joachimf]

I actually knew that once...  It is of course the key c in different octaves. But I don't remember what it was called, nor any more than I just said.. lol..
BUt I read it in a book called "Music Notation" by Gardner Read (https://www.amazon.com/exec/obidos/ASIN/0800854535/plainsongs/104-1602823-5868706)

If I have the time I might check in at the library tomorrow and find the book and check it out..  You made me curious as well

[joachimf]

Sorry, al was ahead of me with a much better reply You might want to check out that book anyway though if you're interested in such things:)

[Dazzer]

google

you sure you don't mean:

C- C'+ C'''+++ C''--?

[goansongo]

I think it's just called octave identification.  But people now use the Braille music notation.