akustisiksi

Akustisiksi is a Finnish grammatical form of the adjective akustinen, meaning acoustic. It is the translative form, used to express a change of state or designation: something becomes or is treated as acoustic.

In usage, akustisiksi typically follows verbs of becoming, such as muuttua (to become) or tehdä (to make into). It is especially common with nouns referring to instruments or environments when describing a change to an acoustic version or quality. The form is often used with plural nouns, but can appear with singular nouns in appropriate predicative constructions as well.

Examples include:

- Kitarat muuttuvat akustisiksi. (The guitars are becoming acoustic.)

- Kitarat muutettiin akustisiksi. (The guitars were changed into acoustic ones.)

Related forms include akustinen (the base adjective meaning acoustic) and akustiset (the nominative plural form). The adverbial form akustisesti means “acoustically.” The term originates from Finnish akustinen, itself from the same root as in English “acoustic,” with the translative suffix -ksi forming akustiseksi or akustisiksi in context.

Notes on usage:

- Akustisiksi is a technical or descriptive term used in music technology, architecture of spaces with acoustical design, and discussions of instrument design or sound-propagation properties.

- It can appear in academic, professional, or journalistic Finnish when noting a transition to acoustic characteristics or classifications.

Overall, akustisiksi is a specialized but standard inflected form used to denote becoming or designation as acoustic in Finnish.