Voice Activity Ring

<div class="nuda-av2-voice" aria-label="Dana is speaking">
  <span class="nuda-av2-voice__ring" aria-hidden="true"></span>
  <span class="nuda-av2-voice__avatar" style="background:linear-gradient(135deg,#34d399,#0ea5e9)">D</span>
  <span class="nuda-av2-voice__mic" aria-hidden="true">
    <i class="nuda-av2-voice__bar"></i>
    <i class="nuda-av2-voice__bar"></i>
    <i class="nuda-av2-voice__bar"></i>
  </span>
</div>

.nuda-av2-voice {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
}

.nuda-av2-voice__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid #e4ff54;
  animation: _nuda-av2voicering 1.6s ease-out infinite;
  will-change: transform,opacity;
}

.nuda-av2-voice__avatar {
  position: relative;
  z-index: 1;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #052014;
  font-weight: 700;
  font-size: 15px;
}

.nuda-av2-voice__mic {
  position: absolute;
  z-index: 2;
  right: -2px;
  bottom: -2px;
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 14px;
  padding: 2px 4px;
  border-radius: 7px;
  background: #0a0a0a;
  border: 1px solid rgba(255,255,255,.12);
}

.nuda-av2-voice__bar {
  display: block;
  width: 2.5px;
  height: 4px;
  border-radius: 1px;
  background: #e4ff54;
  transform-origin: bottom;
  animation: _nuda-av2voicebars 1s ease-in-out infinite;
}

.nuda-av2-voice__bar:nth-child(2) {
  animation-delay: .18s;
}

.nuda-av2-voice__bar:nth-child(3) {
  animation-delay: .36s;
}

@keyframes _nuda-av2voicering {
  0% {
    transform: scale(.9);
    opacity: .9;
  }
  100% {
    transform: scale(1.35);
    opacity: 0;
  }
}

@keyframes _nuda-av2voicebars {
  0%,100% {
    transform: scaleY(.4);
  }
  50% {
    transform: scaleY(1.6);
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-av2-voice__ring {
    animation: none;
    opacity: .5;
    transform: scale(1);
  }
  .nuda-av2-voice__bar {
    animation: none;
    transform: scaleY(1);
  }
}