{'fraction_non_alphanumeric': 0.011834319526627219, 'fraction_numerical': 0.0, 'mean_word_length': 5.271604938271605, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 1, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Developing an Open Source Sonar Navigation Device

Commercial assistive devices tend to be expensive and difficult for the user to customise to their specific needs. We have developed a hand mounted sonar navigation device designed specifically to be vastly more affordable, while being easy for individuals to both make and customise. This paper covers the process of developing the device, publishing complete details of the device, and the results of having interested individuals make their own version.