Because the production facilities were outdated, there was no way to tape the sound on site, and the noise made by the machines was very loud. When Hou Hsiao-hsien filmed A Time to Live and a Time to Die he had to wrap the machines in quilts to muffle the noise.
當時電影界由於器材老舊、無法現場收音，機器本身發出的噪音也很大，因而出現侯孝賢拍《童年往事》時，必須用棉被把機器包起來，以減少噪音的情況。