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

本研究旨在探讨压缩处理电视广播声源对轻度听力损失老年人听力的影响。将电视广播中的声源分为四个频带，然后对每个频带的信号采用不同的压缩比进行压缩。处理后的信号在消声室中通过扬声器呈现给老年人。有些人评价说，在4 kHz频率以上放大6 dB的处理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，处理后的信号并没有改善听力。 这些结果表明，它可能是难以适用于压缩处理的声源从电视广播更好地听取所有老年人。

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.