Stop auditing an SQL statement or accesss to a specific database 
  object. 
  
  Syntax:
Privileges
   NOAUDIT {ALL|ALL PRIVILEGES|sql_statement|system_priv} [options]
      [WHENEVER [NOT] SUCCESSFUL]
      options:
            BY user
            BY proxy [ON BEHALF OF ANY|user]
Schema Objects
   NOAUDIT {ALL|action} on [schema.]object
      [WHENEVER [NOT] SUCCESSFUL]
   NOAUDIT {ALL|action} on DIRECTORY directory_name
      [WHENEVER [NOT] SUCCESSFUL]
   NOAUDIT {ALL|action} on DEFAULT
      [WHENEVER [NOT] SUCCESSFUL]
actions:
   ALTER, AUDIT, COMMENT, DELETE, EXECUTE, GRANT,
   INDEX, INSERT, LOCK, RENAME, SELECT, UPDATE
You can disable all auditing with the init.ora parameter AUDIT_TRAIL = NO
"Happiness is good health and a bad memory" ~ Ingrid Bergman
Related Oracle Commands:
AUDIT
GRANT
 DBA_AUDIT_EXISTS 
 
 DBA_AUDIT_OBJECT           USER_AUDIT_OBJECT 
 
 DBA_AUDIT_SESSION          USER_AUDIT_SESSION 
 
 DBA_AUDIT_STATEMENT        USER_AUDIT_STATEMENT 
 
 DBA_AUDIT_TRAIL            USER_AUDIT_TRAIL