1. Horn tweeter in a sphere (transparent for illustration only) with tweeter model 27TFF (H0831), courtesy of SEAS Fabrikker AS and prototyping courtesy of Object Envy Ltd
2. Cell phone model Nokia 7.1, courtesy of HMD Global OY
3. Dynamic microphone model D230, courtesy of AKG
4. Condenser microphone model 4190, courtesy of Brüel & Kjær Sound & Vibration Measurement A/S
5. Aluminum-cone woofer model 100DW/8A, courtesy of Bandor
6. Transmission-line: Wave® music system, courtesy of Bose Corporation
7. Ribbon microphone model KSM313 courtesy of Shure®microphones, which are copyrighted by Shure Incorporated and used with permission
8. Electrostatic loudspeaker model FrontRo, courtesy of Mellow Acoustics Ltd