. Author manuscript; available in PMC: 2022 Aug 2.

Published in final edited form as: Noise Control Eng J. 2019 Jan 1;67(1):23–30. doi: 10.3397/1/37673

Table 2—

Measurement differences between the NIOSH SLM app and type 1 SLM by external microphone type.

Microphone	Metric (dB)	Laboratory test			Field test
Microphone	Metric (dB)	N	Mean	SD	N	Mean	SD
i436	L _Aeq	64	1.1	1.6	6	−0.8	1.4
	L _max	64	1.9	0.9	6	−1.5	2.4
	L _peak	64	0.3	1.2	6	1.1	1.5
iMM6	L _Aeq	66	−0.5	0.9	14	−2.6	2.6
	L _max	66	0.6	1.7	14	−2.5	2.8
	L _peak	66	−0.5	5.0	14	0.0	2.1