Simple categories matching acoustic:

• instrument,
• energy,
• instrumentation,
• means,
• alarm,
• component,
• combination,
• form,
• characteristic,
• attribute,
• property,
• dimension,
• signal,
• phenomenon,
• sound,
• event,
• bag,
• equipment,
• track,
• output,
• structure,
• constant,
• radiator,
• system,
• condition,
• artifact,
• music,
• information,
• indicator,
• source,
• context,
• noise,
• medium,
• occurrence,
• data,
• domain,
• enclosure,
• measure,
• practice,
• function,
• style,
• group,
• result,
• keyboard,
• wonder,
• resonator,
• analysis,
• unit,
• material,
• filter,
• environment,
• transducer,
• converter,
• interference,
• item,
• detector,
• quantity,
• space,
• sensor,
• activity,
• quality,
• sensation,
• foam,
• disturbance,
• reflector,
• horn,
• genre,

Members with property acoustic:

• cellular_phone,
• crimson_tower,
• troll_cittern,
• violin,
• piano,
• accelerometer,
• acoustic_piano,
• software_synthesiser,
• flute,
• lcd_projector,
• heating,
• cello,
• guitar,
• vocal_sound,
• pure_tone,
• drum,
• mandolin,
• bassoon,
• voiced_speech,
• airport,
• advertisement_call,
• attenuation_characteristic,
• white_noise,
• sound_sensitivity,
• banjo,
• current,
• clarinet,
• ground_reflection,
• animal_footstep,
• vowel_space,
• chamber_group,
• frequency_range,
• transponder,
• echolocation_sound,
• line,
• seismic_data,
• octave_mandola,
• vinyl_foam,
• violin_fiddle,
• clapping,
• membrane_microphone,
• prepared_zither,
• radio,
• particle_velocity,
• balcony_enclosure,
• sonar_dome,
• chime,
• screen,
• ultrasound_energy,
• insect_sound,
• mountain_dulcimer,
• energy,
• attenuation,
• medium_room,
• underwater_telephone,
• regularity,
• trombone,
• flamenco,
• audio_device,
• xylophone,
• trumpet,
• engine_sound,
• slide,
• opener,
• cricket_display,
• balalaika,
• theft,
• directivity,
• matrix_cracking,
• percussion_toy,
• loudspeaker,
• squeal,
• timber,
• sensitive_microphone,
• equivalent,
• threshold,
• keyboard,
• acoustic_echo,
• noise_data,
• car_noise,
• acoustic_velocity,
• roulette,
• solo_oboe,
• handbell,
• musical_signal,
• alarm_call,
• radar,
• mineral_fibre,
• blockage,
• piezoelectric_devices,
• torpedo-tube_flooding,
• reverberation,
• viola,
• early_reflection,
• spectrum_analysis,
• frequency_characteristic,
• mineral,
• harmonics,
• reed_brass,
• talker_pitch,
• keyboard_click,
• strange_story,
• sinusoidal_tone,
• voiced_sound,
• hand_clap,
• reef_bombing,
• feature,
• blues,
• classical_music,
• sound_distribution,
• rollicking_fiddle,
• contrabass,
• tone_color,
• control,
• hand_drum,
• mechanical_impact,
• acoustic_pressure,
• contour,
• slide_guitar,
• machinery_noise,
• bang,
• speaker,
• acoustic_intensity,
• brief_sound,
• musical_sound,
• shop,
• call,
• compressibility,
• room_size,
• irish_pennywhistle,
• woodwind,
• solid,
• specific_theme,
• environmental_information,
• rustling,
• spectral_density,
• fluency,
• speaker_part,
• intensity,
• background,
• cocktail-party_condition,
• cow_horn,
• rallying_rate,
• audio_signal,
• quartz-crystal_microbalance,
• compressed_air,
• speech_rate,
• time_history,
• toy,
• delta_blues,
• articulatory_control,
• acoustic_reflection,
• syllable,
• articulation,
• temporal_parameter,
• button_accordion,
• cadence,
• alto_sax,
• small_room,
• shot,
• density,
• equipment_noise,
• accordion,
• phonetic_feature,
• opera,
• transmission_loss,
• tone_pip,
• bluegrass,
• band_concert,
• stiffness_constant,
• acoustic_duo,
• laughter,
• sound_speed,
• lap_steel,
• bell,
• speaker_enclosure,
• pipe,
• rale,
• horn_mouthpiece,
• water,
• windows,
• saxophone,
• cello_banjo,
• field_recording,
• tune,
• ship_structure,
• studio,
• reed,
• marimba,
• vehicular_noise,
• horn,
• foam,
• key_tone,
• travel_guitar,
• whistling,
• aircraft_noise,
• sound,
• folk_harp,
• foghorn,
• amplifier,
• musical-instrument_sound,
• volume,
• multiple_reflection,
• humidity,
• headphone,
• longitudinal_wave,
• theater,
• intermittent_tapping,
• drone,
• periodicity,
• boundary,
• heavy_drapery,
• vocal_jitter,
• pennywhistle,
• organ_keyboard,
• clarity_index,
• prosody,
• warning_tone,
• street,
• jingling_key,
• voice,
• sonar,
• tambourine,
• filtering_function,
• spectrum,
• crackle,
• second,
• video,
• uptown,
• violin_string,
• music,
• fife,
• grunt,
• jitter,
• ron_caravan,
• speed,
• polyester,
• high_sensitivity,
• projector,
• dixieland_band,
• shape,
• time_component,
• rhythm,
• knocking,
• mandola,
• gun_shot,
• mating_call,
• tube,
• duct_resonance,
• roosting_call,
• cylinder,
• intercom,
• tongue_click,
• communications_system,
• helmholtz_resonator,
• choir,
• banging,
• glockenspiel,
• harmonica,
• acoustic_absorptivity,
• small_accordion,
• words,
• duration,
• muffler,
• speaker_variation,
• fish_finder,
• cable_tv,
• velocity,
• street_noise,
• siren,
• rise_time,
• duct,
• simple_heating,
• theatre,
• female_song,
• koto,
• contact_call,
• head,
• muzzle_blast,
• change,
• environmental_vibration,
• ney_flute,
• point,
• tenor_banjo,
• recording_room,
• piano_jazz,
• volumetric_absorption,
• amplitude,
• tone,
• reverberation_time,
• resonance,
• church,
• violin_drum,
• rock,
• defect_crack,
• ship_shock,
• range,
• spectral_content,
• earphone,
• pitch_range,
• tweeter,
• station,
• vibration,
• alarm,
• resonance_body,
• pressure,
• clavichord,
• sound_transmitter,
• useful_information,
• speech_data,
• communication_call,
• rate,
• foot_steps,
• sax,
• sound_level,
• buzzer,
• dry_source,
• boot,
• classical_guitar,
• burst,
• presence,
• warning_alarm,
• room,
• sam_trio,
• spatial_decay,
• word,
• vocalic_onset,
• organs,
• intelligibility,
• gunshot,
• noise,
• repetition_period,
• oriental_instrument,
• road_noise,
• telephone,
• fabric,
• tuba,
• sitar,
• spectral_shaping,
• speech_signal,
• upright_bass,
• pace,
• acoustic_foam,
• surface_wave,
• warning_siren,
• source,
• damage,
• rod_bell,
• ganglion,
• sound_power,
• perturbation,
• plastic,
• air,
• iron,
• recorder,
• tickling_sensation,
• absorption,
• vibrator_source,
• end,
• reflection,
• auditorium,
• enclosure,
• human_speech,
• engine_cover,
• silence_information,
• sound-pressure_component,
• car_crash,
• akan_trio,
• tonal_disturbance,
• release_burst,
• power_ra,
• home,
• temporal_variation,
• onset,
• glass,
• internal_loss,
• harp,
• commercial_music,
• distance,
• frequency,
• timing,
• soundproof_characteristic,
• sound_studio,
• bird_song,
• hesitation,
• music_signal,
• elastic_stiffness,
• wall_reflection,
• ordnance_burst,
• voice_source,
• tampering,
• explosion,
• unvoiced_sound,
• flight_call,
• speech,
• hysteresis,
• aluminum,
• sonar_signal,
• fo_jitter,
• drive,
• lute,
• sewer,
• dulcimer,
• bamboo_flute,
• wind,
• repetition,
• instrument,
• stress,
• key,
• drape,
• wind_noise,
• sound-wave_reflection,
• sound_quality,
• steel-drum_band,
• folk,
• bass,
• cymbal,
• ensemble,
• receiver,
• kentucky_mandolin,
• ms,
• stiffness,
• surface,
• acoustic_speed,
• acoustic_waveguide,
• repetition_rate,
• phoneme,
• water_depth,
• acoustical_center,
• trumpet_violin,
• zither,
• counting,
• harpsichord,
• phone,
• ukulele,
• humming,
• room_sound,
• acoustic_transducer,
• wave_reflection,
• wave_attenuation,
• sniper_shot,
• loudness,
• late_reverberation,
• horn_instrument,
• celtic_harp,
• heart_sound,
• clarity,
• harmonium,
• piezoelectric_earphone,
• washboard,
• telephone_ringing,
• blast,
• workplace,
• room_temperature,
• vibraphone,
• diatonic_accordion,
• shimmer,
• various_guitar,
• aforementioned_piano,
• radiation_efficiency,
• brilliance,
• hand,
• lamp,
• earthquake_shock,
• ultrasound_sensor,
• organ,
• flaw,
• home_theater,
• frequency_component,
• ultrasonic_energy,
• note_attack,
• additive_noise,
• mobile_telephone,
• acoustic_particle,
• reverberance,
• waveguide,
• microphone,
• radio-frequency_antenna,
• hand-clapping_sound,
• ringing,
• jazz,
• brass,
• oboe,
• bugle,
• small_bell,
• environmental_noise,
• soprano_sax,
• chair_squeak,
• pitch,
• practice_room,
• clatter,
• hollow,
• voice_pitch,
• transfer_function,
• loud_call,
• transition,
• auditory_signal,
• pop,
• voice_sound,
• fiddle,
• fellow,
• concertina,
• solo,
• trio,
• traffic_noise,
• propagation_constant,
• transient_change,
• orchestra,
• ambient_noise,
• leak,
• void,
• loud_speaker,
• noise_spectrum,
• tempo,
• vibes,
• distortion_characteristic,
• lyre,
• stereo,
• navigation_system,
• timbre,
• sound-pressure_level,
• intonation,
• complexity,
• decay_time,
• panel_absorption,
• steel,
• room_resonance,
• string_banjo,