94% it’s useful for the elderly : 47% cane 16% wheelchair 8% glasses 7% love 7% hearing aid 5% dentures 4% medicine 94% noise heard in a city : 55% cars 23% people 9% sirens 4% trains 1% barking 1% construction 1% music 94% jellyfish picture 47% jellyfish 23% ocean 18% sting 5% orange 1%