It's the Hyacinth Bucket effect! A third of people change their voice when they speak on the phone

Daily Mail

In the survey, nearly half of respondents admitted they are trying to sound more well-spoken. Pictured: Hyacinth Bucket in 1990s BBC sitcom Keeping Up Appearances pronounced her surname Bouquet. https://www.dailymail.co.uk/news/article-9032887/Its-Hyacinth-Bucket-effect-people-change-voice-speak-phone.html?ns_mchannel=rss&ns_campaign=1490&ito=1490