Answer:
a) Low-frequency; high-frequency
Step-by-step explanation:
With compression technology, low-frequency sounds are often amplified more than high-frequency sounds. Compression technology is used in audio processing to reduce the dynamic range of audio signals, which means that softer sounds are boosted (amplified) while louder sounds are attenuated (reduced in volume). This can result in a more balanced and consistent audio output, particularly for low-frequency sounds that might otherwise be less audible.