Sound is determined by the speed of the vibrations, known as frequency.
Slow vibrations (low frequency) are heard as deep tones, such as thunder, while fast vibrations (high frequency) are heard as high tones, such as birds chirping.
With the nature of hearing loss, the first sounds to go are usually high frequency sounds. This is why you might struggle to hear a mobile phone ring, the voice of a grandchild or leaves rustling.
If you think you might be experiencing hearing loss, take our 5 minute
online hearing test here.
bloom™ hearing specialist, Melissa Chandler, spoke to Everyday Health about how we hear: