button.directory-panel-play-btn {
  background-image: url(https://www.name-coach.com/images/emailsig/speaker.png); /*speaker-32px.png*/
  background-repeat: no-repeat;
  background-position: center;
  -webkit-background-size: contain;
  -moz-background-size: contain;
  -o-background-size: contain;
  background-size: contain;
  /* put the height and width of your image here */
  height: 30px;
  width: 30px;
  border: none;
  background-color: transparent;
  margin-left: 5px
}

button.directory-panel-play-btn:hover {
    -webkit-filter: brightness(70%);
    -webkit-transition: all 1s ease;
    -moz-transition: all 1s ease;
    -o-transition: all 1s ease;
    -ms-transition: all 1s ease;
    transition: all 1s ease;
}

button.directory-panel-play-btn span {
  display: none;
}

h3.directory-panel-name {
  display: flex;
  align-items: center;
}