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Commentary New ‘Eq-Tool’ Aims To Help Improve Equalization Technique

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DeeperBlue.com Editorial
Apr 7, 2006
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If you’re a freediver or scuba diver looking to improve your equalization techniques, there’s a new gadget being crowdfunded for just that purpose. The Eq-Tool is a digital device developed to improve equalization skills. It gently blows air into a nostril, opening the eustachean tube and making the eardrum vibrate. The amount of air pressure […]

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