To meet virtually any marine recording need, Song Meter SM4M recorders are available as acoustic and ultrasonic models. We’ve carefully selected variety of hydrophones for specific applications that meet strict performance criteria.
Ideal for recording whale songs, dolphin whistles, and/or ambient noise levels our Acoustic Hydrophone records frequencies from 2Hz to 48kHz, with a sensitivity of -165dB re: 1 V/uPa. The hydrophone also features an integrated LED for instant confirmation of unit operation.
Ideal for recording dolphin and porpoise echolocations, our Ultrasonic Hydrophone records frequencies from 2Hz to 192kHz, with a sensitivity of -165dB re: 1 V/uPa. The hydrophone also features an integrated LED for instant confirmation of unit operation.
This hydrophone was specifically designed with a lower sensitivity of -240dB re: 1 V/uPa in order to record and quantify very high sound pressure level sounds, such as those produced by pile drivers and air guns. This hydrophone can be ordered alone or along with an Acoustic Hydrophone, to allow the simultaneous recording of quieter sounds.
All of our hydrophones can be special-ordered with a cable between the SM4M and hydrophone to provide placement flexibility for nearly any marine research project. A variety of lengths are available. Contact Wildlife Acoustics Sales for more information.
Frequency Response and Noise Charts
Acoustic Hydrophone Noise
Ultrasonic Hydrophone Noise
Hydrophone Frequency Response Comparison
NOTE: The dip in response at 2 kHz is caused by resonance in the housing and can be avoided with a cabled hydrophone available for special order.