| Section 801-21: General terms |
| 801-21-01 | acoustic oscillation | |
| 801-21-02 | audible sound | |
| 801-21-03 | infrasound | |
| 801-21-04 | ultrasound | |
| 801-21-05 | pure sound | |
| 801-21-06 | complex sound | |
| 801-21-07 | warble tone | |
| 801-21-08 | noise | |
| 801-21-09 | random noise | |
| 801-21-10 | white noise | |
| 801-21-11 | pink noise | |
| 801-21-12 | ambient noise | |
| 801-21-13 | background noise | |
| 801-21-14 | reverberation | |
| 801-21-15 | sound spectrum | |
| 801-21-16 | line spectrum, <in acoustics> | |
| 801-21-17 | continuous spectrum | |
| 801-21-18 | static pressure | |
| 801-21-19 | instantaneous sound pressure | |
| 801-21-20 | sound pressure | |
| 801-21-21 | peak sound pressure | |
| 801-21-22 | reference sound pressure | |
| 801-21-23 | sound exposure | |
| 801-21-24 | particle | |
| 801-21-25 | instantaneous particle displacement | |
| 801-21-26 | particle displacement | |
| 801-21-27 | peak particle displacement | |
| 801-21-28 | instantaneous particle velocity | |
| 801-21-29 | particle velocity | |
| 801-21-30 | peak particle velocity | |
| 801-21-31 | volume velocity | |
| 801-21-32 | instantaneous particle acceleration | |
| 801-21-33 | simple sound source | |
| 801-21-34 | point sound source | |
| 801-21-35 | strength of a simple sound source | |
| 801-21-36 | sound power of a source | |
| 801-21-37 | sound energy flux | |
| 801-21-38 | sound power density | |
| 801-21-39 | instantaneous potential sound energy density | |
| 801-21-40 | instantaneous kinetic sound energy density | |
| 801-21-41 | sound energy density | |
| 801-21-42 | acoustic radiation pressure | |
| 801-21-43 | spectral density | |
| 801-21-44 | power spectral density | |
| 801-21-45 | time constant | |
| 801-21-46 | stimulus | |
| 801-21-47 | response | |
| 801-21-48 | distortion | |
| Section 801-22: Levels |
| 801-22-01 | level | |
| 801-22-02 | bel | |
| 801-22-03 | decibel | |
| 801-22-04 | neper | |
| 801-22-05 | sound power level | |
| 801-22-06 | sound intensity level | |
| 801-22-07 | sound pressure level | |
| 801-22-08 | particle velocity level | |
| 801-22-09 | (vibratory) acceleration level | |
| 801-22-10 | peak level | |
| 801-22-11 | time-average sound pressure level | |
| 801-22-12 | band sound pressure level | |
| 801-22-13 | spectrum density level | |
| 801-22-14 | weighted sound pressure level | |
| 801-22-15 | peak frequency-weighted sound pressure level | |
| 801-22-16 | time-average sound level | |
| 801-22-17 | sound exposure level | |
| Section 801-23: Transmission and propagation |
| 801-23-01 | wave | |
| 801-23-02 | surface wavefront | |
| 801-23-03 | free progressive wave | |
| 801-23-04 | compressional wave | |
| 801-23-05 | longitudinal wave | |
| 801-23-06 | plane wave | |
| 801-23-07 | spherical wave | |
| 801-23-08 | cylindrical wave | |
| 801-23-09 | transverse wave | |
| 801-23-10 | rotational wave | |
| 801-23-11 | bending wave | |
| 801-23-12 | Rayleigh wave | |
| 801-23-13 | interference | |
| 801-23-14 | beat | |
| 801-23-15 | standing wave | |
| 801-23-16 | node, <of a standing wave> | |
| 801-23-17 | antinode | |
| 801-23-18 | speed of sound | |
| 801-23-19 | sound wave velocity | |
| 801-23-20 | phase velocity | |
| 801-23-21 | group velocity | |
| 801-23-22 | dispersion | |
| 801-23-23 | refraction, <of sound waves> | |
| 801-23-24 | specular reflection | |
| 801-23-25 | diffraction | |
| 801-23-26 | scattering | |
| 801-23-27 | sound field | |
| 801-23-28 | free sound field | |
| 801-23-29 | near sound field | |
| 801-23-30 | far sound field | |
| 801-23-31 | diffuse sound field | |
| 801-23-32 | reverberant sound field | |
| 801-23-33 | linear exponent of sound propagation | |
| 801-23-34 | elementary exponent of sound propagation | |
| 801-23-35 | attenuation coefficient | |
| 801-23-36 | elementary attenuation of propagation | |
| 801-23-37 | acoustic phase coefficient | |
| 801-23-38 | elementary dephasing of sound propagation | |
| 801-23-39 | transmission loss | |
| 801-23-40 | absorption loss | |
| 801-23-41 | divergence loss | |
| 801-23-42 | refraction loss | |
| 801-23-43 | acoustic streaming | |
| Section 801-24: Oscillation |
| 801-24-01 | forced oscillation | |
| 801-24-02 | free oscillation | |
| 801-24-03 | transient oscillation | |
| 801-24-04 | self-induced oscillation | |
| 801-24-05 | resonance | |
| 801-24-06 | resonance frequency | |
| 801-24-07 | anti-resonance | |
| 801-24-08 | natural frequency | |
| 801-24-09 | undamped natural frequency | |
| 801-24-10 | damped natural frequency | |
| 801-24-11 | fundamental frequency | |
| 801-24-12 | quality factor | |
| 801-24-13 | mode of oscillation | |
| 801-24-14 | normal mode of oscillation | |
| 801-24-15 | modal numbers | |
| 801-24-16 | fundamental mode of oscillation | |
| 801-24-17 | coupled modes | |
| 801-24-18 | uncoupled mode | |
| 801-24-19 | damping | |
| 801-24-20 | critical damping | |
| 801-24-21 | damping ratio | |
| 801-24-22 | viscous damping | |
| 801-24-23 | logarithmic decrement | |
| 801-24-24 | steady-state oscillation | |
| 801-24-25 | subharmonic response | |
| 801-24-26 | impulse | |
| 801-24-27 | shock pulse | |
| 801-24-28 | duration of shock pulse | |
| 801-24-29 | pulse rise time | |
| Section 801-25: Transducer parameters |
| 801-25-01 | acoustical system | |
| 801-25-02 | mechanical system | |
| 801-25-03 | complex parameter | |
| 801-25-04 | transducer | |
| 801-25-05 | passive transducer | |
| 801-25-06 | active transducer | |
| 801-25-07 | reversible transducer | |
| 801-25-08 | reciprocal transducer | |
| 801-25-09 | transfer function | |
| 801-25-10 | sensitivity (of a transducer) | |
| 801-25-11 | relative sensitivity (of a transducer) | |
| 801-25-12 | sensitivity level (of a transducer) | |
| 801-25-13 | impedance | |
| 801-25-14 | conjugate impedances | |
| 801-25-15 | admittance | |
| 801-25-16 | immittance | |
| 801-25-17 | driving-point impedance | |
| 801-25-18 | transfer impedance | |
| 801-25-19 | short-circuit impedance | |
| 801-25-20 | free impedance | |
| 801-25-21 | loaded impedance | |
| 801-25-22 | open-circuit impedance | |
| 801-25-23 | blocked impedance | |
| 801-25-24 | motional impedance | |
| 801-25-25 | motional admittance | |
| 801-25-26 | mechanical impedance (at a point) | |
| 801-25-27 | mechanical resistance | |
| 801-25-28 | mechanical reactance | |
| 801-25-29 | apparent mass | |
| 801-25-30 | stiffness | |
| 801-25-31 | compliance | |
| 801-25-32 | electromechanical transducer | |
| 801-25-33 | electromechanical coupling coefficient (1) | |
| 801-25-34 | electromechanical coupling coefficient (2) | |
| 801-25-35 | specific acoustic impedance | |
| 801-25-36 | specific acoustic resistance | |
| 801-25-37 | specific acoustic reactance | |
| 801-25-38 | specific acoustic admittance | |
| 801-25-39 | characteristic impedance of a medium | |
| 801-25-40 | acoustic impedance | |
| 801-25-41 | acoustic resistance | |
| 801-25-42 | acoustic reactance | |
| 801-25-43 | acoustic mass | |
| 801-25-44 | acoustic stiffness | |
| 801-25-45 | acoustic compliance | |
| 801-25-46 | acoustic admittance | |
| 801-25-47 | electroacoustic transducer | |
| 801-25-48 | electroacoustic coupling coefficient (1) | |
| 801-25-49 | electroacoustic coupling coefficient (2) | |
| 801-25-50 | reference point | |
| 801-25-51 | principal axis | |
| 801-25-52 | effective acoustic centre | |
| 801-25-53 | pressure sensitivity | |
| 801-25-54 | free-field sensitivity | |
| 801-25-55 | diffraction factor | |
| 801-25-56 | free-field current sensitivity | |
| 801-25-57 | sensitivity to voltage | |
| 801-25-58 | sensitivity to current | |
| 801-25-59 | sensitivity to electric power | |
| 801-25-60 | reciprocity principle | |
| 801-25-61 | reciprocity coefficient | |
| 801-25-62 | close-talking sensitivity | |
| 801-25-63 | axial sensitivity | |
| 801-25-64 | random-incidence sensitivity | |
| 801-25-65 | diffuse-field sensitivity | |
| 801-25-66 | directional pattern | |
| 801-25-67 | directivity factor | |
| 801-25-68 | directional gain | |
| 801-25-69 | angular deviation loss | |
| Section 801-26: Microphones |
| 801-26-01 | microphone | |
| 801-26-02 | standard microphone | |
| 801-26-03 | pressure microphone | |
| 801-26-04 | pressure-gradient microphone | |
| 801-26-05 | omnidirectional microphone | |
| 801-26-06 | directional microphone | |
| 801-26-07 | unidirectional microphone | |
| 801-26-08 | line microphone | |
| 801-26-09 | multiple microphone | |
| 801-26-10 | probe microphone | |
| 801-26-11 | anti-noise microphone | |
| 801-26-12 | carbon microphone | |
| 801-26-13 | electrostatic microphone | |
| 801-26-14 | electret microphone | |
| 801-26-15 | piezoelectric microphone | |
| 801-26-16 | electromagnetic microphone | |
| 801-26-17 | moving-conductor microphone | |
| 801-26-18 | ribbon microphone | |
| 801-26-19 | moving-coil microphone | |
| 801-26-20 | magnetostriction microphone | |
| 801-26-21 | electronic microphone | |
| 801-26-22 | ionic microphone | |
| 801-26-23 | thermal microphone | |
| 801-26-24 | close-talking microphone | |
| 801-26-25 | lip microphone | |
| 801-26-26 | lapel microphone | |
| 801-26-27 | mask microphone | |
| 801-26-28 | throat microphone | |
| 801-26-29 | bone-conduction microphone | |
| 801-26-30 | telephone microphone | |
| Section 801-27: Loudspeakers and earphones |
| 801-27-01 | loudspeaker | |
| 801-27-02 | loudspeaker unit | |
| 801-27-03 | electrostatic loudspeaker | |
| 801-27-04 | piezoelectric loudspeaker | |
| 801-27-05 | electromagnetic loudspeaker | |
| 801-27-06 | moving-conductor loudspeaker | |
| 801-27-07 | magnetostriction loudspeaker | |
| 801-27-08 | ionic loudspeaker | |
| 801-27-09 | pneumatic loudspeaker | |
| 801-27-10 | cone loudspeaker | |
| 801-27-11 | dome loudspeaker | |
| 801-27-12 | (acoustic) horn | |
| 801-27-13 | horn loudspeaker | |
| 801-27-14 | multicellular loudspeaker | |
| 801-27-15 | multichannel loudspeaker | |
| 801-27-16 | acoustic baffle | |
| 801-27-17 | acoustic enclosure | |
| 801-27-18 | earphone | |
| 801-27-19 | telephone earphone | |
| 801-27-20 | headphone | |
| 801-27-21 | headset | |
| 801-27-22 | insert earphone | |
| 801-27-23 | supra-aural earphone | |
| 801-27-24 | circumaural earphone | |
| 801-27-25 | transducer cartridge | |
| 801-27-26 | bone-conduction vibrator | |
| Section 801-28: Various apparatus |
| 801-28-01 | sound level meter | |
| 801-28-02 | audiometer | |
| 801-28-03 | acoustic coupler | |
| 801-28-04 | mechanical coupler | |
| 801-28-05 | artificial ear | |
| 801-28-06 | artificial mouth | |
| 801-28-07 | artificial voice | |
| 801-28-08 | artificial mastoid | |
| 801-28-09 | thermophone | |
| 801-28-10 | electrostatic actuator | |
| 801-28-11 | pistonphone | |
| 801-28-12 | Rayleigh disk | |
| 801-28-13 | acoustic radiometer | |
| 801-28-14 | sound analyser | |
| 801-28-15 | vibration meter | |
| 801-28-16 | sound locator | |
| 801-28-17 | stereophonic sound system | |
| 801-28-18 | vocoder | |
| 801-28-19 | visible speech apparatus | |
| 801-28-20 | hearing aid | |
| 801-28-21 | hearing protector | |
| Section 801-29: Physiological acoustics |
| 801-29-01 | pitch | |
| 801-29-02 | mel | |
| 801-29-03 | loudness | |
| 801-29-04 | sone | |
| 801-29-05 | loudness level | |
| 801-29-06 | calculated loudness level | |
| 801-29-07 | phon | |
| 801-29-08 | equal-loudness contour | |
| 801-29-09 | timbre | |
| 801-29-10 | judged perceived noise level | |
| 801-29-11 | perceived noise level | |
| 801-29-12 | noisiness | |
| 801-29-13 | noy | |
| 801-29-14 | tone-corrected perceived noise level | |
| 801-29-15 | effective perceived noise level | |
| 801-29-16 | air conduction | |
| 801-29-17 | bone conduction | |
| 801-29-18 | threshold of hearing | |
| 801-29-19 | masked threshold | |
| 801-29-20 | normal threshold of hearing | |
| 801-29-21 | standard threshold of hearing | |
| 801-29-22 | threshold of pain (in electroacoustics) | |
| 801-29-23 | normal threshold of pain | |
| 801-29-24 | hearing threshold level | |
| 801-29-25 | hearing level | |
| 801-29-26 | pure tone audiogram | |
| 801-29-27 | auditory sensation area | |
| 801-29-28 | normal auditory sensation area | |
| 801-29-29 | sensation level | |
| 801-29-30 | recruitment | |
| 801-29-31 | masking | |
| 801-29-32 | masking audiogram | |
| 801-29-33 | auditory critical band | |
| 801-29-34 | detection (in acoustics) | |
| 801-29-35 | detection differential | |
| 801-29-36 | difference limen for loudness | |
| 801-29-37 | difference limen for pitch | |
| 801-29-38 | relative difference limen for frequency | |
| 801-29-39 | aural harmonic | |
| 801-29-40 | electrophonic effect | |
| 801-29-41 | instantaneous speech power | |
| 801-29-42 | peak speech power | |
| 801-29-43 | average speech power | |
| 801-29-44 | formant | |
| 801-29-45 | articulation | |
| 801-29-46 | threshold of speech intelligibility | |
| Section 801-30: Musical acoustics |
| 801-30-01 | fundamental tone | |
| 801-30-02 | partial | |
| 801-30-03 | harmonic | |
| 801-30-04 | harmonic series of sounds | |
| 801-30-05 | vibrato | |
| 801-30-06 | note | |
| 801-30-07 | frequency interval | |
| 801-30-08 | logarithmic frequency interval | |
| 801-30-09 | octave | |
| 801-30-10 | tempered whole tone | |
| 801-30-11 | tempered semitone | |
| 801-30-12 | savart | |
| 801-30-13 | cent | |
| 801-30-14 | musical scale | |
| 801-30-15 | Pythagorean scale | |
| 801-30-16 | just scale | |
| 801-30-17 | equally tempered scale | |
| 801-30-18 | standard tuning frequency | |
| Section 801-31: Architectural acoustics |
| 801-31-01 | sound absorption | |
| 801-31-02 | sound (power) absorption coefficient | |
| 801-31-03 | statistical sound (power) absorption coefficient | |
| 801-31-04 | sound (power) reflection coefficient | |
| 801-31-05 | sound pressure reflection coefficient | |
| 801-31-06 | equivalent absorption area of an object or of a surface | |
| 801-31-07 | reverberation time | |
| 801-31-08 | decay rate | |
| 801-31-09 | Eyring absorption coefficient | |
| 801-31-10 | Sabine absorption | |
| 801-31-11 | room absorption | |
| 801-31-12 | Sabine absorption coefficient | |
| 801-31-13 | reverberation room | |
| 801-31-14 | live room | |
| 801-31-15 | mean free path | |
| 801-31-16 | random incidence | |
| 801-31-17 | diffuse-field distance | |
| 801-31-18 | free-field room | |
| 801-31-19 | dead room | |
| 801-31-20 | audiometric room | |
| 801-31-21 | echo | |
| 801-31-22 | multiple echo | |
| 801-31-23 | flutter echo | |
| 801-31-24 | specific wall impedance | |
| 801-31-25 | specific wall admittance | |
| 801-31-26 | radiation factor | |
| 801-31-27 | radiation index | |
| 801-31-28 | Helmholtz resonator | |
| 801-31-29 | dissipation | |
| 801-31-30 | dissipation factor | |
| 801-31-31 | porous absorber | |
| 801-31-32 | porosity | |
| 801-31-33 | flow resistance | |
| 801-31-34 | specific flow resistance | |
| 801-31-35 | flow resistivity | |
| 801-31-36 | average sound pressure level in a room | |
| 801-31-37 | level difference | |
| 801-31-38 | normalized level difference | |
| 801-31-39 | sound reduction index | |
| 801-31-40 | flanking transmission | |
| 801-31-41 | impact sound pressure level | |
| 801-31-42 | normalized impact sound pressure level | |
| 801-31-43 | field normalized impact sound pressure level | |
| 801-31-44 | sound absorbing material | |
| 801-31-45 | acoustical insulation material | |
| 801-31-46 | impact-sound reducing material | |
| Section 801-32: Underwater acoustics |
| 801-32-01 | sonar | |
| 801-32-02 | active sonar | |
| 801-32-03 | passive sonar | |
| 801-32-05 | sonar self-noise | |
| 801-32-09 | reverberation-limited condition | |
| 801-32-10 | noise-limited condition | |
| 801-32-15 | thermocline | |
| 801-32-16 | isothermal layer | |
| 801-32-17 | limiting ray | |
| 801-32-18 | convergence zone | |
| 801-32-19 | shadow zone | |
| 801-32-20 | sound channel, <in underwater acoustics> | |
| 801-32-21 | deep scattering layer | |
| 801-32-26 | hydrophone | |
| 801-32-28 | underwater sound projector | |
| 801-32-29 | transducer, <in underwater acoustics> | |
| 801-32-30 | ping | |
| 801-32-31 | continuous wave | |
| 801-32-32 | real aperture sonar | |
| 801-32-33 | synthetic aperture sonar | |
| 801-32-34 | sonar transmitter | |
| 801-32-35 | pinger | |
| 801-32-36 | transponder, <in underwater acoustics> | |
| 801-32-37 | sonar receiver | |
| 801-32-38 | echo sounder | |
| 801-32-39 | fisheries echo sounder | |
| 801-32-40 | navigation echo sounder | |
| 801-32-41 | scientific echo sounder | |
| 801-32-42 | single-beam echo sounder | |
| 801-32-43 | dual-beam echo sounder | |
| 801-32-44 | split-beam echo sounder | |
| 801-32-45 | multibeam sonar | |
| 801-32-46 | scientific multibeam sonar | |
| 801-32-47 | sidescan sonar | |
| 801-32-48 | parametric sonar | |
| 801-32-49 | acoustic lens-based sonar | |
| 801-32-50 | acoustic Doppler current profiler | |
| 801-32-51 | Doppler velocity logger | |
| 801-32-52 | calibrated acoustic source | |
| 801-32-53 | calibrated hydrophone | |
| 801-32-54 | standard target | |
| 801-32-55 | sonar dome | |
| 801-32-56 | underwater acoustic positioning system | |
| 801-32-57 | particle velocity sensor | |
| 801-32-58 | transmit beam | |
| 801-32-59 | far field | |
| 801-32-60 | receive beam | |
| 801-32-61 | beamwidth, <in underwater acoustics> | |
| 801-32-62 | source level | |
| 801-32-63 | propagation loss, <in underwater acoustics> | |
| 801-32-64 | transfer function, <in underwater sound propagation> | |
| 801-32-65 | sonar calibration | |
| 801-32-66 | sonar equation | |
| 801-32-67 | background noise, <in underwater acoustics> | |
| 801-32-68 | sonar dome insertion loss | |
| 801-32-69 | ambient noise, <in underwater acoustics> | |
| 801-32-70 | acoustic ray | |
| 801-32-71 | reverberation, <in underwater acoustics> | |
| 801-32-72 | extinction, <in underwater acoustics> | |
| 801-32-73 | beamforming | |
| 801-32-74 | range compensation | |