Effective Loud Phone Ringer Operation
Choosing an effective loud ringer solution depends greatly on the environment the telephone ringer will be used in. For reference, the following chart provides a guide to compare sound levels in typical application environments.
Typical Noise Levels
| Noise Level (in dBA) |
Noise Level Description | Applications & Comments |
| 95 - 100 | Extreme | Front rows of a rock concert; Textile mills; Conversation virtually impossible |
| 80 - 90 | Very Noisy | Machine shop, printing plant; Conversation difficult if not impossible; Hearing protection may be worn |
| 70 - 75 | Noisy | Factory; busy restaurant; Voices must be raised to communicate |
| 60 - 65 | Quiet | Office, Department Store; Voices easily understood |
| 50 - 55 | Very Quiet | Empty Auditorium or idle warehouse Any noise easily heard |
 |
Allowable Background Noise vs. Distance to Listener
The following chart provides a guide to how Algo's Loud Ringers (1825 Duet Plus and the 8180 SIP Audio Alerter) perform with various background noise levels and distances. As can be seen, the greater the distance between the listener and the loud ringer, the lower the allowable background noise levels must be in order for the ringer to be effective.
| Distance |
Ringing
|
Paging
|
||
| Feet (m) |
Built-in Speaker
|
Horn Speaker
|
Built-in Speaker
|
Horn Speaker
|
| 4 (1.2) |
91
|
110
|
77
|
93
|
| 10 (3) |
83
|
102
|
69
|
85
|
| 20 (6.1) |
77
|
96
|
63
|
79
|
| 30 (9.1) |
73
|
92
|
59
|
75
|
| 50 (15) |
69
|
88
|
55
|
71
|
| 100 (30) |
63
|
82
|
-
|
65
|
| 200 (61) |
57
|
76
|
-
|
59
|
| 500 (152) |
-
|
68
|
-
|
51
|
| 1000 (305) |
-
|
62
|
-
|
-
|
|
||||
Background noise level measured in dBA.
