Trane TRG-TRC007-EN manual Answers

Answers

1Hertz (cycles per second)

2A sound at a single frequency. A sound at a narrow band of frequencies that is significantly greater than the sound at adjacent frequencies would be similar to a tone.

3Sound pressure

4A-weighted sound-pressure level is better for describing outdoor sound

5Noise Criteria rating is better for describing sound in an office or classroom

6NC-35 (see Figure 75)

sound pressure, dB ref 20 mPa

80

70

60

50

40

30

20

10

							NC-65
							NC-60
							NC-55
			NC-35				NC-50
							NC-45
							NC-40
							NC-35
							NC-30
							NC-25
							NC-20
							NC-15
63	125	250	500	1,000	2,000	4,000	8,000

octave-band frequency, Hz Figure 75

7False

8True

9Receiver sound correction (or room effect)

10Reverberant

11ARI Standard 260–2001,Sound Rating of Ducted Air Moving and Conditioning Equipment

70 TRG-TRC007-EN