9 Royalty-Free Audio Tracks for "Ultrasonic"

An ultrasonic humidifier working. Recorded by sony xperia c5305.

Testing and playing with an ultrasonic foetal heart detector.

A soprano pipistrelle recorded in the vicinity of maynooth university in september 2019. Originally recorded at 192 khz, this rate has been changed to 16 khz to make the sounds audible. In this extract the bat can be heard echolocating which culminates in a 'feeding buzz' as the bat catches prey. Recorded on a sony pcm d100 using knowles ultrasonic mics. Noise reduction has been applied.

Ultrasonic field recording at 192ksps 16-bit of after-dusk garden noises, mainly wind.

Ultrasonic field recording at 192ksps 16-bit of after-dusk garden noises, mainly wind. (the mp3 is downsampled to 48ksps. _.

Ultrasonic field recording at 192ksps 16-bit of after-dusk garden noises, mainly wind.

Bats recorded along the lagan river near belfast in september 2019. This recording was originally made at 192 khz but the registered sample rate has been changed to 16 khz in order to make their ultrasonic calls audible in playback. In this excerpt you can hear social calls (the trills), soprano pipistrelle echolocation (the higher pitched chirps) and common pipistrelle echolocation (the lower pitched chirps). Recorded on a sony pcm d100 using knowles ultrasonic mics. Noise reduction has been applied.

I made this as a near ultrasonic sms signal. Created and edited with audacity, filtered with glame bandpass filter. If you hardly cut a pure tone, you introduce a whole lot of other frequencies to the signal at the cutting point. To avoid this after the cutting you need to filter the whole thing with a bandpass filter to ensure you have as little other frequency content as possible. It will audibly soften the start and the end of the sound. That's what i did here.

Recorded with: zoom h6 "handy recorder" lom úcho (ultrasonic omnidirectional microphone from slovakia!). A pouring of a drink with carbonation (fancy sparkling water). The reason it is monoaural is because it is easier to record singular sources in monoaural without having too much stereo variance in the recording which can if improperly recorded cause clipped audio on one side of the channel (though this reduces the width and dimensionality of a sound sample - this also makes it easier for (independent) game developers and film projects to place the sound.