By the use of sound content in a very wide variety (on the plans as inter and intra-specific sources of their geographical), the possibility to compare information on populations of bats sampled acoustically is now possible at the European level . Two main limitations are discussed, less accurate vis-à-vis other methods reach more local (but with fewer species included) and low reliability of identification Myotis at specific (recurring problem for all methods available to date).
Kwa kutumia sauti ya kumbukumbu kubwa utofauti (juu ya mipango kama asili inter na ya ndani ya maalum ya kijiografia ya zao), uwezekano wa kulinganisha taarifa juu ya idadi ya popo sampuli acoustically sasa inawezekana katika ngazi ya Ulaya . Mbili mapungufu kuu ni kujadiliwa, chini usahihi mot à-gentemot njia nyingine ya kufikia zaidi wa ndani (lakini pamoja na aina chache ni pamoja na) na chini kuegemea ya kitambulisho Myotis maalum katika (mara kwa mara ni tatizo kwa mbinu zote zilizopo hadi sasa).