Onda - Model HM-Series - Membrane Hydrophones
For most pulsed wave imaging applications that require a flat response over a broad bandwidth, membrane hydrophones are the recommended choice. With their uniform sensitivity these devices provide accurate reproduction of a pulse including harmonic distortion up to 45 MHz. The single membrane HMA model has a traditional laminar construction that does not significantly affect the wave as it interacts with the device. The backed membrane HMB model has additional ruggedness because of its lossy backing. Because the backing is designed to match the properties of water, it also does not affect the acoustic wave under normal amounts of energy for imaging applications. However, under high intensity fields (e.g., lithotripsy applications), blisters may generate in the backing and damage the hydrophone.