Citations:indoor voice

Noun: "a calm, quiet voice, used to avoid disturbing others"

 * 2011, Lisa Unger, Darkness, My Old Friend, Broadway (2011), ISBN 9780307465184, page 57:
 * The toddler at the far table issued a little shriek of delight over something. "Indoor voice," his mother whispered.
 * 2012, Michelle Stimpson, Failing Into Grace, Dafina Books (2012), ISBN 9780758246912, page 232:
 * "There are a lot of people without jobs right now. It's not their fault," Alexis whispered, trying to model an appropriate indoor voice for her father.
 * 2014, Bobbi Govanus, How To Pilot When We Were Raised to BE Stewardesses: Reinventing Your Life with Passion and Purpose, Lulu.com (2014), ISBN 9781304778482, page 18:
 * She knew when I was on a business call that she had to be quiet and use her indoor voice.
 * 2014, Kate Racculia, Bellweather Rhapsody, Houghton Mifflin Harcourt (2014), ISBN 9780544133471, page 242:
 * She's easy to be with, provided you don't mind the constant chatter, the non-sequitur song cues, or her total lack of an indoor voice.
 * 2015, Mary Ellen Guffey & Dana Loewy, Essentials of Business Communication, Cenage Learning (2015) ISBN 9781305560239, page 376:
 * Practice smartphone etiquette by being considerate, observing quiet areas, using your indoor voice, taking only urgent calls, not calling or texting while driving, and choosing a professional ringtone.
 * 2015, Denise Hunter, Married 'til Monday, Thomas Nelson (2015), ISBN 9781401687076, page 46:
 * The air conditioner woke her each time it kicked on, and a kid next door didn't seem to have an indoor voice—or a bedtime.