9. An article of manufacture including a non-transitory computer-readable medium, having stored thereon program instructions that, upon execution by a computing device, cause the computing device to perform operations comprising: based on characteristics of a first unit of input speech, selecting a gender-specific speaker adaptation technique, wherein the gender-specific speaker adaptation technique relates to a particular gender; conducting automatic speech recognition (ASR) of a second unit of input speech, wherein the ASR of the second unit of input speech is based on the gender-specific speaker adaptation technique; while conducting the ASR of the second unit of input speech, selecting a speaker-dependent speaker adaptation technique, wherein the speaker-dependent speaker adaptation technique is based on characteristics of the second unit of speech and relates to a particular speaker of the particular gender; and conducting ASR of a third unit of input speech, wherein the ASR of the third unit of speech is based on the speaker-dependent speaker adaptation technique.
9. An article of manufacture including a non-transitory computer-readable medium, having stored thereon program instructions that, upon execution by a computing device, cause the computing device to perform operations comprising: based on characteristics of a first unit of input speech, selecting a gender-specific speaker adaptation technique, wherein the gender-specific speaker adaptation technique relates to a particular gender; conducting automatic speech recognition (ASR) of a second unit of input speech, wherein the ASR of the second unit of input speech is based on the gender-specific speaker adaptation technique; while conducting the ASR of the second unit of input speech, selecting a speaker-dependent speaker adaptation technique, wherein the speaker-dependent speaker adaptation technique is based on characteristics of the second unit of speech and relates to a particular speaker of the particular gender; and conducting ASR of a third unit of input speech, wherein the ASR of the third unit of speech is based on the speaker-dependent speaker adaptation technique. 14. The article of manufacture of claim 9 , wherein selecting the speaker-dependent speaker adaptation technique based on characteristics of the second unit of input speech comprises determining that the characteristics of the second unit of input speech fit a speaker-dependent speech model associated with the speaker-dependent speaker adaptation technique better than the characteristics of the second unit of input speech fit one or more additional speaker-dependent speech models.