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(bashref.info)Double Quotes

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Double Quotes
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   Enclosing characters in double quotes (`"') preserves the literal
value of all characters within the quotes, with the exception of `$',
``', and `\'.  The characters `$' and ``' retain their special meaning
within double quotes (Note: Shell Expansions).  The backslash retains
its special meaning only when followed by one of the following
characters: `$', ``', `"', `\', or `newline'.  Within double quotes,
backslashes that are followed by one of these characters are removed.
Backslashes preceding characters without a special meaning are left
unmodified.  A double quote may be quoted within double quotes by
preceding it with a backslash.

   The special parameters `*' and `@' have special meaning when in
double quotes (Note: Shell Parameter Expansion).