A highly specific type of hooked materials, when applied to the shoulder of a tennis racquet, have been found to tangentially hook onto the nap of a tennis ball and allow the ball to be lifted from the court. Hooked materials characterized as comprising a series of heat-treated nylon monofilament hooks in a rowed relationship (300/inch) of an average diameter of 8.5 mil, 1.91 mm mean height, 1.13 mm mean width and 0.71 mm mean hook depth are particularly effective for retrieving all common types of tennis balls.
Alice Howe and Freebo perform at 8 p.m. at Club Passim, 47 Palmer St., Harvard Square, Cambridge. $23 to $25. Collaborators since 2017, former Bonnie Raitt bassist Freebo weaves his unique fretless bass stylings around Howes effortless, emotionally resonant voice, which seems tailor made for most e