I have the same issue except mine is on Windows and isn't limited to the in game hints. It seems the sound artifact occurs after I close a scroll but then will recur when I do something like interact with the innkeeper menu (I just started playing and am at the Black Hound Inn). The sound goes into a loop and I can sometimes get it to stop by clicking the different menu items but most of the time I have to exit back to the main menu (don't have to exit the client completely). This occurs on both my USB headset and speakers using default MS drivers.
DXDiag info for sound devices:
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Sound Devices
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Description: Speakers (4- Logitech USB Headset)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: USB\VID_046D&PID_0A14&REV_0130&MI_00
Manufacturer ID: 65535
Product ID: 65535
Type: WDM
Driver Name: USBAUDIO.sys
Driver Version: 6.01.7601.18208 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 7/12/2013 06:40:58, 109824 bytes
Other Files:
Driver Provider: Microsoft
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX 2.0 Listen/Src: No, No
I3DL2 Listen/Src: No, No
Sensaura ZoomFX: No
Description: Digital Audio (S/PDIF) (High Definition Audio Device)
Default Sound Playback: No
Default Voice Playback: No
Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0892&SUBSYS_18490892&REV_1003
Manufacturer ID: 1
Product ID: 65535
Type: WDM
Driver Name: HdAudio.sys
Driver Version: 6.01.7601.17514 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 11/20/2010 06:44:23, 350208 bytes
Other Files:
Driver Provider: Microsoft
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX 2.0 Listen/Src: No, No
I3DL2 Listen/Src: No, No
Sensaura ZoomFX: No