Therapeutic ultrasound and microbubble technologies seek to drive systemically administered microbubbles into oscillations that safely manipulate tissue or release drugs. Such procedures often detect the unique acoustic emissions from microbubbles with the intention of using this feedback to control the microbubble activity. However, most sensor systems reported introduce distortions to the acoustic signal. Acoustic shockwaves, a key emission from microbubbles, are largely absent in reported recording, possibly due to the sensors being too large or too narrowband, or having strong phase distortions. Here, we built a sensor array that countered such limitations with small, broadband sensors and a low phase distorting material. We built 8 needle hydrophones with polyvinylidene fluoride (PVDF, diameter: 2 mm) then fit them into a 3D-printed scaffold in a two-layered, staggered arrangement. Using this array, we monitored microbubbles exposed to therapeutically-relevant ultrasound pulses (center frequency: 0.5 MHz, peak-rarefactional pressure: 130-597 kPa, pulse length: 4 cycles). Our tests revealed that the hydrophones were broadband with the best having a sensitivity of -224.8± 3.2 dB re 1 V/μPa from 1 to 15 MHz. The array was able to capture shockwaves generated by microbubbles. The signal-to-noise (SNR) ratio of the array was approximately 2 times higher than individual hydrophones. Also, the array could localize microbubbles (-3dB lateral resolution: 2.37 mm) and determine the cavitation threshold (between 161 kPa and 254 kPa). Thus, the array accurately monitored and localized microbubble activities, and may be an important technological step towards better feedback control methods and safer and more effective treatments.