Understanding Noise Reduction Rating (NRR). Typical NRR of Meeting Phone Booths. Factors Affecting the NRR of a Phone Booth. Measuring the Effectiveness of a Phone Booth’s NRR. Why...

1. An Urgent Call? The SOPPhone Office Telephone Booth Has You Covered It’s 1 PM. You’re fine-tuning a critical AdWords campaign when—ring!—a highly valued partner calls. You’ve b...