<prompt> Translate the following text to EnglishKwa hivyo, kwa sababu ya uwezo wa kupima sauti ya watu, sauti ya watu inabadilika sana kutoka asubuhi hadi jioni, na hii ni tatizo kubwa katika utambuzi wa hotuba.  <response>: and they have a theyre able to average it over a number of different occasions because peoples voices change a lot even from morning to evening and thats uh a big problem in speech recognition 