Compression processong of sound source from television broadcasting for the universal design

这项研究调查了电视广播声源的压缩处理对轻度听力损失老年人听力的影响。将电视广播的声源分为四个频带，然后以不同的压缩比对每个频带的信号进行压缩。处理后的信号通过消声室中的扬声器呈现给老年人。一些人评价说，在 4 kHz 频率以上放大 6 dB 的处理后的信号比原始信号更容易听。然而，对于大多数人来说，与原始信号相比，经过处理的信号并没有改善听力。 这些结果表明，可能很难对电视广播的声源进行压缩处理，以提高所有老年人的听力。

This study investigated effects of compression processing of sound sources from television broadcasting on listening in elderly people with mild hearing loss. The sound sources from television broadcasting were divided into four frequency bands, and then the signal of the each bandwidth was compressed with a different compression ratio. The processed signals were presented to the elderly people by a loudspeaker in an anechoic room. Some of the people evaluated that the processed signals with amplification of 6 dB above a frequency of 4 kHz were easier to listen to than the original signal. For the majority of the people, however, the processed signals did not improve listening as compared to the original signal. These results suggest that it might be difficult to apply compression processing of sound sources from television broadcasting for better listening in all elderly people.