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Loudspeaker quality depends on off-axis radiation because rooms reflect it

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tags	ja-picks, causal_relationships, trade, singleton, category/causal-relationships
aliases	@floyd_e_toole_sound_2017, loc. 118

Sep 20, 20261 min read

Loudspeaker quality depends on off-axis radiation because rooms reflect it

Evidence

However, the anechoic frequency response measurements of loudspeakers must include those sounds that are radiated off axis, as well as on axis. This is necessary to be able to describe the character of the reflected sound field in small rooms that the binaural hearing system responds to in different ways. — Toole, Floyd E, Sound reproduction- the acoustics and…, 118

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Loudspeaker quality depends on off-axis radiation because rooms reflect it
Evidence

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Audio research effort is inverted relative to where people actually listen
Bass rises in reflected room sound for all forward-firing loudspeakers
Broadband ETCs are untrustworthy whenever reflections differ spectrally from direct sound
Critical distance is short for typical domestic listening rooms
Early reflection control often concealed flawed off-axis loudspeaker performance.
Loudspeaker cabinet volume sets the lower frequency limit
Mounting a speaker in a wall extends its critical listening distance substantially.
On-axis curves alone cannot predict loudspeaker sound quality
On-axis response alone cannot predict how a loudspeaker sounds in a room
Room acoustics should be described with perceptual rather than physical values
Scientific studies of loudspeaker directivity effects in rooms are scarce despite high enthusiast interest
Small rooms alter source impedance and reduce sound radiation at low frequencies
Sound colouration emerges from the combined loudspeaker and room properties
The spinorama is the default standard display for anechoic loudspeaker data.
Transducer resonances radiate widely and thus stay audible in rooms
Wavefield synthesis fails unless the room is completely anechoic
Toole, Floyd E — Sound reproduction- the acoustics and psychoacoustics of loudspeakers and rooms
Toole, Floyd E — Sound reproduction- the acoustics and psychoacoustics of loudspeakers and rooms

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Loudspeaker quality depends on off-axis radiation because rooms reflect it

Loudspeaker quality depends on off-axis radiation because rooms reflect it

Evidence

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