How to Measure an In Ear Monitor
Of great concern to many headphone and earphone users is the measured frequency response. Much emphasis is often put on the frequency response curve. With the recent work by Sean Olive et al. of Harman corporation (a good summary is available InnerFidelity), enthusiasts are much more aware of what can be considered ‘good sound’ from an objective standpoint. It can be instructive for the consumer to learn how measurements are made.
On comfort of In-Ear monitors
In-ear monitors (IEMs) are often considered superior to headphones because of the superior isolation from external noises. Additionally, because of the small acoustic volume of the ear canal (typically 2cc), high SPL levels, and resulting high bass with low THD, can easily be achieved. However IEMs can have a reputation for discomfort. This paper addresses how Periodic Audio Inc. (PAI) addresses this issue.