Sound effects, sound experiments, and audio tools.
SEMPRO Sound Lab. is an independent sound lab based in Japan. We synthesize sounds from physical models, analyze voices and instruments, and share what we make as sound effects, videos, articles, and tools.
Products
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Mosquito SFX — 10 Binaural Sound EffectsComing soon
The wingbeat sound of a mosquito (Culex pipiens complex) flying around a person's head, rendered as binaural audio: hovering near the ear, flying around, landing, taking off, and passing by. Please listen with headphones or earphones.
- 10 WAV files
- 24-bit / 48 kHz, stereo
- 3 min 49 s in total (6–60 s each)
- Each file normalized to a −3 dBFS peak
- No background noise (room reflections are part of the sound)
Track list
- Hovering near left ear30 s
- Hovering near right ear30 s
- Flying around: left / right / front 160 s
- Flying around: left / right / front 260 s
- Landing on left ear10 s
- Landing on right ear10 s
- Taking off from left ear8.3 s
- Taking off from right ear8.3 s
- Passing by from back to front (left)6 s
- Passing by from back to front (right)6 s
How the sounds were made
The sounds are synthesized with a physical model. AI assistance was used in writing the program. No generative AI audio model was used to create the sounds. The pitch change caused by motion (Doppler effect) is exaggerated so that it can be heard.
Tools & experiments
Insect wingbeat physical model
Computes the sound of insect wings from their motion and moves it around the listener's head as binaural audio. Used for the mosquito sound effects and the 2-hour ASMR video.
Videos
On YouTube, in Japanese.






Articles
On note, in Japanese.
Contact & Support
Questions about a product or a download, or business inquiries — please use the Support page.