Generally clear and highly intelligible. This is an ideal bitrate for spoken-word content like news updates, audiobooks, or simple podcasts.

Bitrate refers to the number of bits processed per unit of time. At 48 kbps:

A 48 kbps MP3 file totaling 1.29 MB represents approximately of audio. At this bitrate, the quality is generally suitable for speech or podcasts but will lack the fidelity required for high-quality music. Blog Post Title: Making the Most of Low-Bitrate Audio Introduction

You will notice a "metallic" or "underwater" quality, especially in higher frequencies like cymbals or sharp vocals.