百度未果，特来咨询

Upon the destruction of a Sonic Periscope, an interactable rubble pile will grant all players in the area a Sonic Periscope Audio Log. These logs may be turned in to Audio Log Collector NPCs for 100
karma each.
The rubble pile will remain for a short time; typically (depending on spawn location) after approximately 5 minutes a new Sonic Periscope will appear, removing the previous rubble pile from which the audio log could be collected.
Turning in the Audio Logs will also advance the monthly Spy on This! achievement, which requires 150 logs to complete.
月常成就 Spy on This! 要这个东西，可以换100karma点数。
换东西的npc位置和名字：
Wayfarer Foothills: Snowlord's Gate, Vigil Lheola
Snowden Drifts: Hunter's Pitfalls, Highpass Haven Waypoint, Vigil Aston
Plains of Ashford: Ashford Forum, Ashford Waypoint, Vigil Bangeold the Sleepless
Diessa Plateau: Northern exit from the Black Citadel, near Nolan Waypoint, Vigil Oudre Wraithwoe
Iron Marches: Monger's Sink - Village of Scalecatch Waypoint, Vigil Nathaneol

英文的，本人是英文盲，看不懂啊。

就是每一个都可以换100点karma，然后有个成就需要150个这个

建议你直接摧毁