The phrase "acted as a speaker" is grammatically correct and can be used in written English.
It typically describes someone who takes on the role of a speaker or presents a speech or information to an audience. Example: During the conference, John Smith acted as a speaker, delivering a compelling presentation on the latest advancements in technology.
He has acted as a speaker for GlaxoSmithKline.
JC has acted as a speaker for Eisai, Forest, Janssen, Novartis, Pfizer and Lundbeck.
ML has acted as a speaker for Servier and Astra-Zeneca.
Chiara Paglino has acted as a speaker for Pfizer Oncology, Hoffmann-La Roche, GSK and Bayer-Schering Pharma.
AS has acted as a speaker for, consulted to, or received grant support from: Astellas, Bayer, Forrest, Pfizer, Theravance, and Trius.
H.J.L. consults to CSL Behring, Pharming, Dyax, Shire and ViroPharma and has acted as a speaker for CSL Behring, Viropharma and Shire.
The idea is that when the person wants to vocalize something they think the words and the chip translates those brainwaves into words and feeds them to an external voice box, that acts as a speaker.
"Another possibility is that they're emitting sounds that they can hear". Such low-frequency oto-acoustic emissions occur when the stiff hair cells in the fluid-filled inner ear move, causing the eardrum to act as a speaker.
Subsequently, she was in regular contact with the group and acted as a keynote speaker at a London event in June 1997.
In 1995, she graduated from El Nasr Girls Collegee, where she had acted as a student speaker.
The lawyer for a small Texas school district labored during a spirited argument today to persuade the justices that a student chosen by election, and not told by school officials what to say or not say, acted as an "independent speaker" when leading a pregame prayer and so did not place the school district in the position of breaching the separation of church and state.
