SMM-U2 Ultrasonic Microphone
The SMM-U2 microphone's low noise and superior sensitivity results in recording bat calls at greater distances. The enclosure's innovative weatherproof design includes a built-in mounting bracket that allows for a wide range of mounting options. The microphone includes a 5 meter cable, and can use up to 100 meters of cable with no adverse effect on recording quality.
SMM-U1 Ultrasonic Microphone
The SMM-U1 microphone can use up to 100 meters of cable with no adverse effect on recording quality.
Song Meter SM4BAT GPS Option
For researchers who have large geographic areas to cover, the GPS option is a valuable, time-saving tool. The Option logs recording locations and path information for transects. It also sets the Song Meter's clock to within one second of the GPS time base so you be assured that all of your recorders are accurate to the same clock.
SM3/SM4 Power Cable
The SM3/SM4 Power Cable allows your Song Meters to run on external battery power, or a complete solar panel charging system. Simply plug the cable into the recorder's power connector and connect the other end to the battery system using the included spade or ring terminals. Song Meters will handle external power sources from 4.5 to 17V DC and is protected against accidental reverse voltage.
Chosen for the Song Meter SM4BAT, SM4, SM3BAT and SM3, this lock will ensure your recorder's cover is secured. The unit features a brass body and cylinder to provide extra resistance to the elements. The marine grade lock is keyed alike, allowing multiple locks to open with the same key.
Weather Resistant Cable Lock
Specially selected for the Song Meter SM4BAT, SM4, SM3BAT and SM3, the adjustable locking mechanism holds the 6'/1.8m cable tight in any position for a secure fit. The unit features a weather resistant lock and vinyl coated 5/16"/8mm braided steel cable. Note: Lock is keyed differently.
Created to keep prying teeth and claws away from your SM4 and SM4BAT, the custom designed Armor accessory is the best solution for maximum protection. Armor encases your Song Meter in an indestructible steel structure coated in a durable powder epoxy finish. It also protects cable and power connections, and provides visibility of the unit's LED light.
Since ultrasound is beyond the range of human hearing, verifying proper system and microphone performance can be a challenge. The Ultrasonic Calibrator is designed to verify the sensitivity of SM3-U1 microphones. It also verifies overall system performance.
Microphone Frequency Responses
The charts below illustrate the frequency response of the SMM-U1 microphone. The subsequent graphs display the directionality plots of the SMM-U1 microphone with and without the directional SMX-Horn. Click on the graph to enlarge.
Charts for the new SMM-U2 microphone will be available soon.
The following polar plots indicate microphone directional sensitivity with and without the SM3-Horn.