A good speaking trumpet makes a good ear trumpet with size adjustments
Evidence
As an application of reciprocity, consider a speaking trumpet and its close relative, the ear trumpet. We have been touting the idea of loading the source by proximity resonance as reason for the much enhanced loudness at a listening post outside, with the source in the throat of the horn. According to the law of reciprocity, an ear trumpet and a voice trumpet are working on the same principle. A good speaking trumpet will be a good ear trumpet, with the following caveat: our mouths are much larger than the ear canal, so a speaking trumpet would actually waste some sound energy by having too large a throat and bouncing some sound off the outer ear. An ear trumpet needs to have a much smaller throat. — Eric J. Heller, Why You Hear What You Hear- An…, 594
Categorization
Category: Causal Relationships
- XREF: Practical consequence of reciprocity pairs with the idea that horn loading works identically whether broadcasting or receiving.
Related
- Ear trumpet bells need to match wavelength to capture low-frequency sound (similarity 0.88)
- Horn acoustics are reciprocal, working identically for source and listener (similarity 0.85)
- Horn loudspeakers amplify sound through proximity resonance in a narrow throat (similarity 0.81)
- A speaking-trumpet flare can boost lower frequencies when wall dissipation dominates resonance enhancement. (similarity 0.81)
- Horn throats boost output by constructive interference with the source (similarity 0.80)
- Speech horns need meter-wide bells to avoid coloring male voices (similarity 0.79)
- A speaking horn’s distant source location distorts vowel-forming resonances (similarity 0.78)