The phrase "affects speech" is correct and usable in written English.
You can use it when discussing how something influences or changes the way someone speaks or communicates.
Example: "The medication he is taking affects speech, making it difficult for him to articulate his thoughts clearly."
Alternatives: "impacts communication" or "influences verbal expression".
The variant gene "affects speech, but with knock-on effects in nonverbal ability," Dr. Vargha-Khadem said.
While the phenomenon of segmental intonation is more and more substantiated at the level of production, we still know little about how it affects speech communication at the level of perception.
All reported that they could use it at levels that made them sweaty and breathless (affects speech).
Reverberation is a measure of how long it takes for sound to decay in a room and a long reverberation time affects speech comprehension negatively.
Our results thus support that TMS to motor cortex indeed affects speech perception and comprehension (rather than any possible response bias or segmentation process).
Whether motor execution affects speech planning processes [Oppenheim and Dell, 2010], or not [Corley et al., 2011; Postma and Noordanus, 1996], is a matter of controversy.
Penchant for hosting parties and affected speech inflections (old sport/darling)?
Even that can have a benefit because the swelling can cause neurological problems like those affecting speech or motion.
When the members of a creepy self-help group request confessionals, Portia delivers a surprisingly affecting speech about the fact that people think she's dumb.
Her castmate Ann Dowd gave the night's most affecting speech, as one of the only winners who seemed to regard winning an Emmy as a genuine honor yet another reason to reward veteran character actors.
The raw grief of Machel was given voice by Ahmed Kathrada who, in arguably the most affecting speech of the past 10 days, laid bare how old age had become Mandela's new jailer.
