after sound meaning in English

后声,余声
余音

If throwing a stone into the small hole , you can hear the after sound of knocking the bottom a long moment later
向小洞内扔石头，隔很久才能听到石头跌落撞击的回音。
Benefited from the rapid development of information technology , 3d animation is recently becoming a new type of medium after sound , image , video and 3d model
随着信息技术的飞速发展，三维动画正在逐渐成为继声音、图像、视频和三维模型之后的第五种多媒体类型。