Modifiers matching constant:

• physiological,
• auxiliary,
• acoustic,
• elastic,
• physical,
• mental,
• symbolic,
• molecular,
• ordinary,
• kinetic,
• macroscopic,
• fixed,
• important,
• relevant,
• optical,
• fundamental,

Simple categories matching acoustic:

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