http://iphonedevwiki.net/index.php/AudioServices
1000 new-mail.caf new-mail.caf MailReceived
1001 mail-sent.caf mail-sent.caf MailSent
1002 Voicemail.caf Voicemail.caf VoicemailReceived
1003 ReceivedMessage.caf ReceivedMessage.caf SMSReceived
1004 SentMessage.caf SentMessage.caf SMSSent
1005 alarm.caf sq_alarm.caf CalendarAlert
1006 low_power.caf low_power.caf LowPower
1007 sms-received1.caf sms-received1.caf SMSReceived_Alert
1008 sms-received2.caf sms-received2.caf SMSReceived_Alert
1009 sms-received3.caf sms-received3.caf SMSReceived_Alert
。。。。。。。