I say this jokingly but if you really, really wanted to go all out, you could use an artificial head with mouth simulator, e.g. https://www.head-acoustics.com/p

I say this jokingly but if you really, really wanted to go all out, you could use an artificial head with mouth simulator, e.g. https://www.head-acoustics.com/products/artificial-head-binaural-recording/hms-ii5 https://www.head-acoustics.com/products/artificial-head-bina... Being a very specialized test instrument, though, it costs vastly more to get such a device and the auxiliary equipment to operate it than the experience would ever be worth. Even basic mouth simulators, sans head, like https://www.bksv.com/en/transducers/simulators/ear-mouth-simulators/4227 https://www.bksv.com/en/transducers/simulators/ear-mouth-sim... are astonishingly expensive.