@Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Sound other = (Sound) obj;
        if ((this.name == null) ? (other.name != null) : !this.name.equals(other.name)) {
            return false;
        }
        if ((this.date == null) ? (other.date != null) : !this.date.equals(other.date)) {
            return false;
        }
        return true;
    }